I just upgraded to WordPress 2.5 and it seems to have gone ok. If you’re running an earlier version you should update now because many blogs running earlier versions are getting hacked.
My host Blacknight has a nice server side installer called Installatron, which made backing up and installing very easy.
As for the decor: the new interface is gack.
It took me a while to locate the image button, but actually I think some of the features are quite cool. Must play around with it a bit more!
I must be the only person who likes the look of the new interface! Though I did notice it looks better in FF than IE.
I have problems inserting images into posts though.