The new beta is here. New looks to match the BBC Homepage, improved video quality (25% to be infact), improved sound quality. Widget section informing you of what you have recently watched and giving you updates on new episodes of recently watched programs, radio is now located there and can be fastforwarded instead of 'skipping' 5 minutes. There's loads more little updates so just have a look around. It's a beta and only went live earlier today, so give it time to mature and improve.
source @ BBC iPlayer 2.0 Beta