There's a quite a few places where rumors are put up piecemeal, but Imperius Dominatus has a fantastic round-up that seems to cover quite a bit.
You can tell that we're still in the "not definite" stages as there are a few rumors that contradict each other -- not a bad thing, there's going to be things like that when you have different sources of information. Oddly enough, looking through some of the rumors it would appear that some of the changes from the "orphan ruleset" from earlier this year were actually correct -- namely, the change in phase order from Move-Shoot-Assault to Move-Assault-Shoot. I can't decide if I like that change or not -- there's another rumor that said consolidation into assault was back in a la 4th Edition. If so, assault-centric armies are going to be absolutely brutal.
Change is definitely in the wind, gang, and it looks like this summer is going to be a wild ride indeed as our favorite game changes dramatically.
I, for one, and ready for these changes as it's become harder and harder to enjoy a game of 5th Edition these last couple of weeks. I'm ready for some new options, some new ways of playing, and for some new fun from the game I love.
What say you?