I just flashed Cyanagenmod 7 (and love it!) but it's missing something that I really liked in the Fresh Evo ROM. I don't know if it was a Fresh Evo or 2.2 thing, but it had the option of not putting the screen lock on until the phone was idle for X number of minutes. This was great if I was using my phone frequently, but not frequently enough to keep the screen on and it allowed the screen to turn off but the lock screen not to be enabled for several minutes.
I've looked around in CM7 but the option isn't in the same place where it was in Fresh (it was an option in the same place where you add a password/pattern/pin)