Yeah, it's a lot, eh?
I can think of a few main areas: 1. ARM support -- 3 new mainboards in progress 2. The graphics stuff -- with final haswell support on the way 3. the usual random bug fixes and improvements
You might conclude from all this that coreboot is important at google :-)
We would be very, very happy to have someone outside google engage with the beaglebone effort. Anyone?
ron