I'll be waiting for the all clear... No new features or anything worth rushing in for. I'm sure the dev team will test it for issues and let the community know.
I updated to 10.2.1 on my iMac and could not get redsn0w to recognize my iphone in dfu mode so I could reboot tethered. I thought I was going crazy, but I could not get it to work.
Connected iPhone to my Macbook (on which I didn't update iTunes) and redsn0w and itunes recognized the phone in dfu mode right away.
for those that waited it's official.
MuscleNerd: For the cautious JBers who've been asking: iTunes 10.1.2 is safe (allows downgrades,DFU,TU,syncing,all existing hacks)