MS is handling this very poorly. I still am not able to find a news annoucment from MS that is being pushed out nor can I find a list of phones. They need to go back to having the grid announcing what carriers are pushing out updates.
It was announced by Nokia on their blog yesterday:
Starting today, and rolling out over the coming weeks, a message will appear on the phone encouraging users to get the update. Simply connect your phone to your computer via Zune for PC, or the Windows Phone app for Mac - and follow the onscreen instructions.
I'm not sure what you expect them to differently/better. That seems like a pretty streamlined distribution right there.