Personally, I logged onto Meta Stack Overflow for the first time in a few days today and was extremely confused at first as evident by the revisions to my question here. I guess if I had looked around at the recent questions I could have caught on, but regardless I was quite confused.
I would have appreciated some sort of update email sent out to all linked emails of MSO accounts or at least some sort of obnoxious message that you had to read before you could proceed to MSO and use the new site. Obviously this was move was a lot to handle for the staff at Stack Exchange, but I wish I had been more informed.
Migrations like this don't occur too often, but how could something like this be done differently in the future? What do you think?
Update: The following banner was added to the top of every page (I think) on MSO, but this question as posed beforehand: