From wowhead.com 5.0.4 is live today and we have an extensive guide to everything new! While there's no new raids or gear in this patch, many things will keep you busy. Class abilities, talent trees, and glyphs have been drastically changed, so it's good there's a month before Mists of Pandaria to familiarize yourself with the changes! If achievement-hunting is more your thing, all achievements are account-wide in 5.0.4, as well as many mounts, pets, and titles.