So Canon recently released the Rebel T3i / 600D. Personally, from what I've gathered after seeing the specs and some sample footage, this is basically the same as their T2i / 550D. The main difference is the Flip Swivel LCD Screen on the T3i, aside from that, they're pretty much the same.
The Canon T3i has the Swivel LCD and the ability to digital zoom while shooting video...
Here is a test video of some raw footage of the Canon T2i
A low light test with the Canon T2i
Here is some demo footage of the new Canon T3i
More test footage of the Canon T3i
When its all said and done, if money isn't an issue, than I'd buy the T3i over the T2i. But if you are on a budget and you plan on making movies or videos than you need to spend your money more wisely and consider the T2i.With the money left over from the Canon T2i you might want to stock up on extra batteries, or an additional charger.
And since these two cameras are so similar, and the T3i came out so soon after the T2i, I don't think the next model is coming out anytime soon.