#1: In-page comment management
#2: LifeBlog support
If you have a relatively modern Nokia or Symbian phone, you can now post to LiveJournal directly from your cellphone using Nokia's LifeBlog. Anybody can use it, but only LJ paid users can include pictures. Check out the instructions if you have one of those phones.
(for the geeks in the audience: LifeBlog support means our Atom/AtomAPI support is much improved now, so if you have any other AtomAPI apps, try them out too....)