I've been where you are - v frustrating.
The Panasonic FX01 looks good but then it has bad noise at higher ISOs - ugh:
The Canon S80 is just too big.
The Sony T9 or T30 seem OKish but they're not 28mm.
Hmm I'd stick with your Casio.
Eee by gum.
What kind stuff do you like to shoot?