I'm looking at this primarily from a feral perspective, as that is one of my teams.

Feral:
I like a boost of some sort to Mangle, so Shred is not as essential for decent dps.
And a bit of a simplification for Cat DPS is nice too.
The group movement buff will make flag running even more potent, and flags are an option to go for in at least a couple of battlegrounds, possibly more in Cataclysm... will put Stampeding Roar on round-robin, and the entire team will have Dash as well.
Feral kick will help against caster types.. will probably work it into the rotation similar to Wind Shock with the shammies, ideally with each druid using it every fifth move.

Boomkin:
Magic Mushrooms is an interesting name to go with.
I like the mechanic, of tossing bombs which then become hidden fairly quickly.
Not sure if you could use them as direct damage or not, but it adds a bit of depth to the class strategy.
Wrath increasing the power of Arcane, and Starfire increasing the power of Nature... either per cast, per damage or per crit is interesting too; we'll want streaks of one spell followed by streaks of the other, which should be much easier to macro.

Resto:
So many on the forums are arguing for and against the Tree of Life change.
I don't mind if the bonuses are built into the class, and Tree is a burst of power..
Or if the bonuses are built into Tree form itself.
Pretty much same thing, either way... as far as healing goes.