Not sure on Living,Virgin and Bravo-Though personally i can't see them launching on Sky now until they're rebranded.
Pretty sure the next channel to launch on Sky (after Hallmark HD) will be Five HD.
As it's been testing over the last couple of weeks, but labelled as "TBC" but carrying Five programming and epg data, but finally changed its name to Five HD this week, which would indicate an iminent launch.