I've held the XSi, and it was OK, not too small. That's my big concern with the Olympus, it might just be too tiny.

I tend to be happy with Canon ergos; the S3 IS is a bit small for me, but it's not uncomfortable. The Digital Elph series remind me of my Rollei 35, which I loved.

I last shot SLR with 1950's vintage East German equipment. Weird but functional.