Things went pretty smooth.  I'm still sorting through things, but so far so good.  I haven't gotten any complaints from users, and that is a big thing..  I generally get complaints on even the smallest things.  I look forward to building on the foundation of AS 1.4... 

A couple observations on one thing that jumped out at me right away about the new message pop up...

1. You have to have a full AS module installed on the page to use it..  I currently have the elements of the welcome center in my skin as skin objects...    I couldn't figure out why it wasn't working..  It didn't start working until i added an instance of AS with blank template as suggested in the documentation on the forum page.

2.  If you aren't friends with a member that has his settings as messages from friends only, you get a message that they only accept messages from friends..  It would be nice to have the option to add them as a friend right there....