Well, the rumors are slowly trickling out and some things actually look pretty good for us. Take a look at the thread in the Rumors section.
Couple of biggies:
The Rage USR grants +2 attacks on the charge. Obviously, this effects two of our units. PEs and Repentia. I feel that with some of the other changes, PEs will still be useless, but Repentia are really looking rather spiffy. Why? Each one sports FOUR attacks on the charge! I mean, wow. We don't know how else rage was affected or even fleet for that matter, but that's a good thing.
It's confirmed that rapid fire weapons can fire one shot at Max range even if they move. More bolter shots are also good. This really makes Retributers an interesting choice. You can still get a fair number of rending shots off on the move now in case you need to reposition yourself.
Each army is lead by a "warlord." The Warlord is the leader of the army (go figure) and gets special rules. One of the options is for Scoring. This is huge for us. St. Celestine as a Scoring unit? This is a major yes for us. The last tournament I went to used 4th edition scoring rules (anything with a WS can hold) and she single handedly tied a round for me. As in, she was the last model on my side of the board and forced a tie. The other example gave a Ld10 bubble.
Much to the credit of the amazingly incorrect WD BatRep, buildings and the like now have a slot on the FoC, one of which is an AA emplacement. This is good because we don't have any of those.
Something else I found is that FNP is now down to a 5+, which is no good for Repentia...