The sharp-eyed Ronen has picked up on a knowledgebase article which outlines all the big changes in OS 4.3. For anyone not lucky enough to have picked up a new BlackBerry 8130, this should give you all the info you need.
Some of the big changes we’ve heard of before now, but here’s the round-up: enhanced SureType; wireless software updates; sending voice note by e-mail, PIN and IM; phone bass and treble adjustment; security options for locking long-distance and specific phone numbers; local search and route saving on BlackBerry Maps; video MMS support; streaming media; Media Player playlists; video recording; Bookmarks and History viewable on Browser launch; and finally, syncing address books and calendars with integrated e-mail, such as Yahoo! and (presumably) Gmail if you’re on BIS 2.4. Pretty awesome stuff!