I guess this is what most people are experiencing at the moment. The way from .Mac to MobileMe has been a rocky road since yesterday morning. Some of people aren’t even able to access their email, if they’re lucky they can at least read it.
I tried to sign up about twelve hours, now I got it almost working. Web access only works by clicking on IsMobileMeUp.com and then waiting for a few seconds for the redirect. Directly accessing me.com still doesn’t work for me.