Its a good camera but limited if you try to push it,the focus is a little slow and if you are shooting in raw the write to card speed means that you are limited to single shots.
You can shoot 1.5 RAW frames a second using the canon 1000D. It is said to allow 6 shots before the buffer fills also - i find this is really only 3 or 4 though.
I find if I have it on continuous shooting can get about 2 shots before the buffer slows it down, that is with a class 4 card.
Are you shooting RAW+ JPEG?