I just upgraded to wordpress 2.5 from 2.3ish… and my first reactions are positive.  The new images feature is awesome; but if you already have a large library of images from older wordpress versions, migrating them requires alot of page-by-page editing.  

Also, in Safari, none of the admin popup windows in the WSYWIG work.  This is a MAJOR problem that needs fixing!

Also, if you haven’t done so already, head on over to gravatar.com and set yourself up with a visual avatar… your avatar will now automatically post alongside any comments you make.