While I can't give you detailed specifics, I can tell you that it will only take limited advantage of them. The Rebel's biggest drawback is speed (IMHO), however I did see some small improvements after I bought a high speed card, at least. There is a site out there that has thoroughly tested card speed with different cameras, including the Rebel, but I don't seem to have a bookmark for it anymore. It might have been on DPReview, but I'm not sure.
Edit: here it is:
http://www.robgalbraith.com/bins/mul...?cid=6007-6425