There are two new FAQS up at Games Workshop - the Tyranids and Blood Angels.
These FAQS clear up quite a few thing and also answer a few more far reaching issues. The biggest issue that has been covered is the Doom of Malan'Tai. The powers do NOT affect units in vehicles, and you ARE allowed cover saves against it.
One other big thing that has been cleared up is that Fast vehicles are allowed to move Flat Out during the scout move, and they are also allowed to use smoke launchers. This issue has been contested quite a bit here and there.
I'm really glad that they issued a ruling on the Doom - this is in direct opposition to what the INAT has ruled so they should be updating their rules pretty soon.