Wallingford; traded with them several times and they have the fastest delivery turn-around times of anyone.
Harris Cyclery; you name it they have it, and know how to install it.
Peter White; Bought some pit-locks from him, delivered quickly.
The Touring Store; Wayne is a pleasure to deal with, nice man
C-Bike; They sent me a free water bottle with my order
Ortlieb; They thought it took too long to process my order and sent me a free t-shirt for waiting
Brick and mortar
Sunshine Cycles in Athens & Watknisville, Georgia; My LBS, good folks
Bicycle South; in Atlanta--Commuting bike savvy