Or you can do what I did. Manually download the file: (4.2.1) and install it yourself. Then again you can wait if you want.
i was looking for that, is there a direct link download for it ? cant find one
Do a restore in iTunes and it will download the full release. From what I read the full release is exactly the same as the 4.2.1 GM so there really isn't a reason to upgrade.
I'm very surprised that the iPad section isn't all a blaze with official 4.2 news, unless we are all busy playing with the new features right now.
first negative thing im noticing is the battery is getting eaten up pretty quick. Definitely being consumed faster than before 4.2.1 hit today....i hope its not as bad as it was with my 3rd gen ipod touch, which was basically rendered unusable because the batteries would not last more than 3/4 of a day...wish there was a turn off button for MT