jumping in on the roller discussion:

i've had the Nashbar radiused rollers about a month now (the red plastic drums w/ raised lips on the outside). very happy w/ the price:quality. and they do fold if i ever need them to. one thing i will do is see about getting a spare drive belt to have around.

took about three 1/2hr rides before i moved it away from a pole in the basement. and the lips do feel like cheating, as they will keep you on if you drift too far, but don't hit them too hard.

being new to fixed in general, the rollers have really taught me what "spinning" means, as favoring one side or just pushing the pedals straight down results in way too much side to side motion. i compare it to walking on ice, you learn to make small adjustments because you will be punished for trying to bull through it. pretty funny experience for a former fat tire cruiser guy.

have also been able to notice differences in geometry. never knew what you guys meant by 'twitchy' frames until i compared bikes on the rollers. i could see the math, but the ride was a big wake up call.