We got into this recently on another thread, too.
For "pocket-sized" I really like the Canon PowerShot S70: 7 megapixel, 28 - 100 mm "equivalent" focal length lens so you can get most wide shots, and it supports RAW. It also happens to share both storage media (CF) and batteries (NB-2LH) with my Rebel XT. The S80 has superseded it: 8 megapixel sensor and same lens, but RAW support dropped. You can still find the S70 with a little digging, though. Depth of Field with those tiny sensors is exceptional, the actual focal length being 5.8mm to 20.7mm.