It will support the 8100, 8300, 8700 and 8800 device familes. Still on Platform 2.7 (same as OS 4.3). I had never heard of it prior to today. Beta versions of OS 4.3 continue to be released. Honestly, it seems that they were unable to get some features in OS 4.3 prior to finalizing the 'core feature set' of the OS and put them off until the release of a figurative OS 4.5. Carriers supposedly 'own' the OS release. Needless to say, putting some of these features off until OS 4.5, especially with partial implementation in OS 4.3.1 (from the betas I've had), it is VERY disappointing. *hrmph*
In the beginning the Universe was created. This has made a lot of people very angry and is widely regarded as a bad move.