I have put together a new team recently which I am finding to be excellent so far (currently around level 62); I have already promoted it to my B team despite being the 4th team I have started . The general premise is to use as many "over time" effects for both healing and damage as possible and hence have the most mobile PVE team possible. I am currently running:

Druid Tank - I don't have experience with druid tanks but he can aoe on the move easier than the plate tanks and the big hp pool fits the healing method nicely.
Shadow Priest - Nice dots and good buff/debuff synergy with locks
Affliction Lock - See above
Affliction Lock - See above
Druid Healer - Only real choice for totally hot based healing

DPS seems high and downtime is non existent (thanks to an innervate shadow priest macro)

I have never played any of these specs at high level, but it seems awesome so far and after what I have read about cataclysm, the movement it allows may have distinct advantages. Has anyone else tried anything like this, and if so how did it turn out?