The rollling restart today has been very unusual and a royal pain in the ass. Sims have been offline longer than usual, asset server is working slowly or not at all and teleport hiccups have been there, too.
All in all something we all don't really need, I am glad when it's finally over.
[Update]: There's now a new blog entry by Neuro Linden (yes, a new one) about what happened and went wrong with the last update. Basically two things, first some errors in the way they made the new "aggressive" update (and Thursday is going to be another rolling update, but using the old system) and second an error with two VPN servers. So we are going to see what the next rolling update is going to bring us. Yeah!