Faeit 212 got a decent rundown on the GW Openday and some interesting tidbits regarding 6th were touched on:
[URL="http://natfka.blogspot.com/2012/07/faeit-212-exclusive-40k-design-studio.html"]Full article[/URL]
Main points:
-Hull points added to help reduce the randomness of the old vehicle rules, so vehicles degrade along a more regular curve, instead of being impossible to kill, or instantly dead.
-Psyker rules added to give them a more impact in game compared to their watered down versions in 5th.
-Challenges added to give heroes a feel of leading units in battle and offer chances for in-game heroics.
-6 40k projects are in the works right now
-Goal of releasing a major project for the game every month ongoing.
-Alessio was cited as making 5th edition a bit "flat and generic" by pushing towards a balanced competitive-worthy ruleset. They have moved in a different direction for 6th.