I switched from WP7 HTC Trophy to the 822; love it. Have been frustrated by the Windows Account vs. Windows Live ID I had with my Trophy, though. I have my main email account / Windows Account working, but when I try to link either of my two other hotmail accounts, it will not accept the password. I even changed my Windows Account password, to no avail. I cannot open nor link my other two accounts. It was seamless on my Trophy.
The other question I have not found an answer to is: How do I transfer the 2 games I bought through X-Box Live to my 822? My X-Box Account transferred, along with my achievements, but can't figure out how to get the games back.