Updated master list. Let me know about corrections or additions.
It's been over a year since the BF Administrators were asked about setting up a separate Mid-Atlantic forum. If you want to see one and want to help make it happen, please email the site administrators (probably Brian) and ask them politely.
Here is the list as of 03/01/08
1. Trek_Rider_05 - Alexandria, VA
2. cc_rider - Falls Church, VA
3. ks1g - Herndon, VA
4. derath - Baltimore, MD
5. Marylandnewbie - Silver Spring, MD
6. bluehorizons - Columbia Heights, DC
7. kokomo61 - Herndon, VA
8. dirtyphotons - Brookland, DC
9. knucklesandwich - Arlington, VA
10. maxine - Baltimore, MD
11. yakes_md - Severna Park, MD
12. C8H10N4O2 - DC
13. bdcheung - Northwest DC (but soon moving to Reston)
14. mponchione - Chevy Chase, DC
15. adrien -- Old Town Alexandria, VA (commute to Tyson's)
16. grsing -- Georgetown, DC
17. veloellen - Baltimore/south of Towson
18. relaxer -- Capitol Hill
19. hoodoo40 - Fairfax by the Vienna Metro
20. stanseven - Alexandria, So Md (Solomons) on weekends
21. Vitamin_J - Stevensville, md (Kent Island)
22. BWI-Sheldon - Baltimore, MD
23. tlc20010--Columbia Heights, DC
24. BillK - Bowie, MD
25. donhaller - Severn, MD
26. DrPete - College Park, MD
27. joshdcu - Dupont Circle, DC
28. Dingster1- Germantown, MD
29. crosstraining - North Beach, MD
30. Lemurhouse - Arlington VA
31. RacerMike - Eldersburg, MD
32. Lionheart - Lake Ridge, VA
33. edx74 - Takoma, DC, near Walter Reed
34. anomaly - Falls Church, VA (soon in Shaw, NW DC)
35. JustBrowsing - Cleveland Park, DC
36. gfunk - Fairfax, VA
37. heads up! - Columbia Heights, DC
38. Fuzzydave - Bowie, MD
39. bobby c - Silver Spring, MD
40. theopowers - Arlington, VA (commuting to Dupont)
41. Crabby Deb - North Beach, MD
42. Mr. Underbridge - Reston/Herndon, VA
43. Deskjockey - Arlington, VA
44. Nick Carraway - Upper NW DC (near RC Park)
45. sugonaut - Arlington, VA (commuting to Foggy Bottom)
46. Robobo1 - Washington, DC (Columbia Heights)
47. WishYouWasMe- Capitol Heights/Seat Pleasant,MD
48. Dave - Vienna, Va (past W&OD MP13)
49. o-dog - College Park, MD
50. dcvelo - Chevy Chase (not far from Beach Drive...)
51. rpc180 - Northwest DC (Thomas Circle)
52. Kinetikbiker - Burke/Springfield, VA
53. noob2001 - Washington, DC (Cap. Hill NW)
54. skooter - City of Fairfax, VA (20 mile commute to Chinatown)
55. DC Wheels - Washington, DC. I live in Randle Heights & work in Columbia Heights.
56. d monie 1 aka Knightryder - Baltimore\Catonsville, MD
57. h_double - Alexandria, VA (close to Huntington metro & Old Town)
58. senecacyclist - Germantown
59. baymanhhh - Foggy Bottom, DC
60. songfta - Washington, DC (Dupont/Kalorama area)
61. CercaMemorial - Lake Ridge, Fairfax, Chantilly, VA
62. zen4me - Bouncing between Tako Park and Waldorf
63. phoenity - South Riding, VA
64. Sherfy - Sterling, VA
65. cmyke - Fells Point, Baltimore, MD
66. kuma - Bethesda, MD (near Wisconsin Ave and Jones Bridge Road)
67. Cyclochica - Springfield, VA (near Annandale)
68. Two Buck Chuck - Alexandria, VA
69. dbrouse -Waldorf, MD/Alexandria, VA
70. McAwesome - Arlington, VA
71. runJEDIrun - NW Washington, DC
72. fuerein - Old Town Alexandria, VA
73. satbuilder - Owings, MD
74. Thomasdregos - Waterford VA
75. donheff - DC, Capitol Hill, near Eastern Market
76. tombailey - Arlington, VA (Virginia Square)
77. Bigperm - NE Washington
78. Smoothvirus - Arlington, VA (near mile 3 on W&OD)
79. FatguyRacer - Crownsville, MD
80. Chris516 - Washington Grove (Gaithersburg), MD
81. joconnor - College Park, MD (University of Maryland)
82. +SP+ - NW, DC
83. qmsdc15 - Brentwood, MD
84. BlackTaloN - Arlington, VA (Fairlington)
85. oldnoob - Annandale, VA
86. brownnutz - Alexandria, VA
87. srenda - Arlington, VA
88. Flying Monkey - Mt. Pleasant, DC
89. Superide - Damascus, MD
90. actor1-Brookland, NE, DC
91. EastofMidnight - Silver Spring, MD
92. cosmodc - Alexandria, VA (Old Town)/U St. Corridor NW DC
93. Phil2 - Columbia Heights, DC
94. rando31337 - Silver Spring, MD
95. BarracksSi - Capitol Hill
96. Madquiqnezz - Herndon, VA
97. Gurana - Ellicott City, MD
98. Porter - Adams Morgan, DC
99. spike3905 - Chevy Chase, DC
100. Orcanova - Alexandria VA
101. 6 Pins,- Ashburn/Winchester VA
102. Invisiblehand - East Falls Church, VA
103. mikedsel - Glover Park, DC
104. ijgoodwin - Herndon, VA
105. javanm99 - Fairfax, Va
106. GRJ - Falls Church, VA
107. lebowitz - Dupont Circle, DC
108. kevcp - Bealeton, Va
109. wgp - Alexandria, Va
110. mangor$m - Silver Spring & College Park, MD (UMCP)
111. joelpalmer - Baltimore (Butcher's Hill) MD
112. wj13us - Ellicott City, MD
113. psuaero - Ellicott City, MD
114. TheWolverine - OldTown, Alexandria VA
115. Coyote_hiker Washington, DC*
116. dpara - Alexandria*
117. Routergod- Springfield*
118. roadCruiser76 - Charles Town WV*
119. Crack Monkey - Herndon, VA*
120. NavyHeloCycle - Lorton, VA*
121. wngsfn2 - Fairfax, VA
122. VA_Dave - Ashburn, VA
123. EQ - Alexandria, VA
124. mbologna - Rosslyn, VA
125. JohnGZ28 - Laurel, MD
126. landshark - Silver Spring, MD
127. Brink4422 - Gaithersburg, MD
128. NoRacer - Essex, MD
129. GRJ - Falls Church, VA*
130. MichaelScott23454 - Crystal City, VA*
131. Central_Rider - South Riding, VA*
132. kle - Herndon/Chantilly, VA*
133. Silentkelpie - (Old Town) Alexandria, VA
134. dcbiker - Arlington, Va.
135. 33chance - Rockville, MD*
136. JPCowan - Falls Church, VA
137. john888c - Rockville, MD
138. ericy - Vienna, VA*
139. s_ton - Fairfax, VA*
140. spongedad - Bethesda, MD
141. bibi - Bethesda, MD
142. Zencentury - Frederick, MD
143. gman - Silver Spring, MD
144. rabinabo - Odenton, MD
145. Architect - Chevy Chase, DC
146. mjw16-Alexandria (Del Ray), VA*
147. el5y - Reston, VA*
148. newbeat, Fairfax, VA*
149. joshandlauri, Dundalk, MD
150. Neko-Kat, Silver Spring, MD
151. dzdean, Annandale, VA
152. hankbrandenburg, Bristow, VA*
153. teas2ker - Alexandria, VA*
154. CrashGordon - Woodbridge, VA*
155. Capt_phun - Blacksburg, VA & Ashburn, VA
156. waltbiller-Havre de Grace, MD
157. Consularrider - Arlington, VA
158. Popsicleian - Baltimore, MD
159. ringdangdoo - Arlington va
160. ultraman6970 - sterling VA.
161. hrt4me - Vienna, VA
162. NomadVW - Burke, VA
163. D_Nice - Alexandria, VA
164. cyclehen - Falls Church, VA
165. curtisvill - Arlington, VA
166. jubilee - Columbia Heights, DC
167. bike4hunger - southern Maryland
168. bob s. - Annapolis. MD
169. calvini, DC (MacArthur Bl. - near G-town and Palisades)
170. Gerald Chan- Gaithersburg MD
171. CoreyD - Washington, DC
172. Blizzard0999 - Fairfax, VA*
173. BikerJim - Fairfax City, VA
174. MIKEnDC - College Park, MD
175. LotusMan - Manassas, VA*
176. Boneshake - Arlington, VA*
*added from Southeast forum