I have a Fuji F30 (I forgot to bring it yesterday @#$#@$) which I can use one handed, though I wouldn't mind it being even a tad bit bigger. I like it because it has a 3200 speed option, and the pictures turn out fine.
I like the quality of the Canon's just a tad bit more (better colors IMO) but I can't use those one handed.
If I was shopping, I'd take a look at the Nikons which have the wireless network capabilities, I really don't like dealing with cables or dealing with the cards. (I've left the card in my computer before one ride and didn't realize it til it was too late.)
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just being