Here is the link.
A few things that affect Tyranids directly.
A Flying Monstrous Creature which fails a Grounded test must still be hit only by snap fire, and can be Grounded again that same turn (thus suffering an additional hit). As is mentioned in the FAQ, I think GW will ultimately change this, but for now NOVA is going with the RAW which helps FMC quite a bit.
Multiple applications of Enfeeble from different sources are "different" and thus stack. This is a big one.
I would encourage you to give them a thorough read-through, and if after reading Mike's post on the topic you have further questions or challenges to the rulings, post them up in the appropriate place (detailed in the FAQ).
Thanks again to Mike and his crew for all their hard work under such short time constraints.