riding brakeless in NYC (200 miles in 3 days) last summer was way less sketchy than when I converted my SS MTB (which I race/train on and am very familiar with) to fixed for a week in the Wasatch (SLC, UT) singletrack.

Just sayin.

Granted, 7 years of my 10 as a messenger have been of fixed......... but bombing trails is a whole different game (read: takes bigger nuts than my parents gave me)