Since we are in Merica, and all the better review sites are not in Merica, here is a translation of some of the model names out there for Canon:
Merica first since we rule, then what those wimpy Urapeeins call em.
T2i = 550D
T1i = 500D
Xsi = 450D
Xs = 1000D
Oh and we have plenty of the T2i’s to buy your loved ones!