Update: That was quick! Looks like BlackBerry App World 3.0 is already available. Head to blackberry.com/appworld from your device to download.
BlackBerry App World 3.0 has been in beta for a few weeks now, and according to Alex Kinsella, Team Lead, BlackBerry App World Product Management, it looks like a public release may be on the way today. The beta has been pretty smooth with no major issues, so the official release should go over pretty well. BlackBerry App World 3.0 features a new UI, new My World features, new channels, app social sharing and much more. Stay tuned later today for an official release.