This is a nice start, but Apple still has a lot of work to do to get MobileMe up and running 100% for everyone.
For example, push e-mail still doesn't work yet on my iPhone (even though it works great on my wife's with her separate account). It's almost like certain accounts have a different set of problems than others. Push contacts, calendars and bookmarks work fine for me, but not mail. Whereas my wife can't get her contacts to push.
This apology e-mail seems to try to give the impression that the service is now fully functional, but it's still not even close to that yet. As long as they keep working on it and get everything truly working here soon, I'll be satisfied enough with that.