I used the 201 until the 301 came out, with integrated heart rate along with the GPS. Not really a bike computer per se, but a useful training tool.
It has an auto-multisport mode which is handy for triathlon training and racing, which is my primary summer / fall sport.
Garmin has just announced a more bike-specific product, the Edge 305: http://www.garmin.com/products/edge305/
It appeals to my computer geek side, but at 88g and unit dimensions of 1.75"W x 3.7"H x .9"D (44 x 94 x 23mm) I don't expect it to have a wide WW appeal.