I thought this would be up here already, but it wasn't, so here goes.
BRB updated: Quite a few changes and most of them seem to be reasonable.
O&G: First FAQ/Errata released
WoC: Just one FAQ about Giants, although some other questions are answered in the BRB FAQ.
I'm sure there are more, but this is as far as I got.
The BRB ones are pretty significant and you definitely need to read them.