If you remove your password, reboot, and then re-enable it, your "K" key will work to password lock the device again. Just a quick note on that issue.
I also added the "K" key to my themes as a test and it seems I can get the lock back for no password as well if I link it to the password lock app. Just a note for theme developers here.
Otherwise so far so good, I am glad the lag I've had in Google maps (Even with 536) is finally gone. GPS locks seem to come to life quickly as well.