This is what I did:
I went online and ordered a power adapter replacement for my iPhone. I was asked for my Mac Support username and pw.
Then, after doing so, the MobileMe icon suddenly appears on my menu bar. (I've never subscribed to this).
I then went to system prefs then MoblileMe (wanting to remove said icon from menu bar). I was told that I had changed my password and that I should type in my new one (?). I tried a few of my pw's (for the heck of it) to no avail. I'm now unable to get into MobileMe prefs and I seem to be stuck staring at this (ugly) icon. I checked my keychains, nothing.
(I did do the 6-month trial on .Mac when I got my MB last Feb. but I wasn't into it. The pw I had for that's not working either.)
Any suggestions?