Hi corpustle!
I own a Canon 7D. Purchased it back before I'd seen t2i vs. 7D video quality tests.
It seems the two are pretty much indistinguishable in terms of video quality.
For what it's worth, I halfway regret having not known more about the t2i then, because I would more than likely have purchased a t2i and put that extra $800 bucks toward a lens or 24-bit audio recorder.
Now, I can't say I totally regret the 7D. It is indeed built like a tank and feels quite substantial when holding it, and there are other benefits, but again - we're really only talking in terms of video capability. The t2i is a very capable camera!
Hope this info helps your decision.