Canon has a fairly simple system for naming its various digital single-lens reflex (SLR) cameras. There are cameras that are named with a single-digit number, like the 1DS and 5D (the EOS 5D Mark II [ ...
If you've held the XSi or XTi, you've held the T1i. It checks in a wee bit smaller and lighter than the D5000 (in case you weren't aware, we'll be doing that with some frequency throughout), though it ...