As a rebel t2i user - I can say that contrary to the sarcasm in some of the posts in this thread, which imply the rebel to be no more then a "toy" I can say, that in my experience, from an IQ point of view, the 18mp "group" t2i, 7d, 60d, t3i - all produce the same jpg's - you would really need to nit pick to find a difference.
Sure the more advanced bodies have many advantages, and the rebel series might be a "toy" as far as build, AF, durability, etc. But for an amateur like me - who shoots for pleasure - its an awesome product in an affordable package.