I feel a little odd starting this thread, but I think we'd all agree we need it.
I just came home from an hour training ride. I could not sustain anything longer than 20 second power on bursts because I wasn't warmed up. Towards the end of the ride I started to come around, and the recoveries came faster - under a minute. I had good power at the end, too, and there were some moments when I was really making an effort that I felt like I was going to be sick ("I'm a Cyclist!"). I did eight of the 20 second bursts, some were on the flats, some were on slight rises. I also did two one mile sustained 20+ MPH paces. I felt pretty good, but I'm not confident I am really ready for a crit just yet. But, you have to start somewhere, and I suppose there is no "true test" quite like a race.
My heart rate numbers will be all scrambled on the upload, though, because my strap was too loose and it ended up around my tummy. I hate it when that happens.