I've been without a cyclecomputer for a few years now. Ran over my last one with a Lincoln Mark VII LSC and never replaced it. It's been pretty nice but I found I did ride slower without feedback.

Just got a fancy fone with ride tracking apps on it and it stays in the pocket. So I just ride like hell and look at the stats when I get home.

EDIT: well, that ain't exactly true. I have one app that tells me via the phone's speaker how many minutes each mile took me and another that announces what my elapsed time, mileage and average speed are.