Downloaded 2.3.3 ftf, and flash tool. followed onscreen instructions, and in 10min i had 2.3.3.
Took a while for things to smooth out, was a little choppy at first. But after another reboot things started being smooth.
Since this is the official ROM everything should work, but here is a list of things i did. I didnt put my sim card in so i didnt send or recieve calls/messages BUT..
+Camera works, 8mp stills and 720p video
+Wifi works - downloaded amazon app store etc.
+Flash works, downloaded flash 10.3 from the market and kongregate works.
+Pinch zoom works. Well you know sonys work around.
+So far so good. Phone is working.
Yes the phone shows up as x10i but the hardware is x10a, so the att 3g/rogers should still work like last time i updated 2.1 generic.