I've got a Panasonic DMC-LX1, shoots RAW, a couple of years old. Try the latest version (LX3?). Mine is pocket sized for larger pockets... There will be a Leica and a Panasonic version, the only real difference is the JPEG software, and if you are grabbing RAW then that is not really important (oh, software, and a couple hundred £'s).
The DP1 sounds great, but apparently takes an age between photo's. Probably great for landscapes, or something, but a pretty major flaw as an everyday P&S. There are lots of reviews around, take a look. If there is ever a DP2 and if it fixes this issue I could easily imagine it being the best selling P&S of all time.
The Canon replacement firmware thing sounds pretty cool, if I were in the market I would probably look into this as a first option. A lovely Ixus with RAW - yum. You'll need to check that the particular camera is viable with replacement firmware though, sorry don't remember the name of the project, but if you ask here I'm sure someone will chip in.
The last point, some P&S's are starting to come out with more sane MP, rather than pushing the count up constantly, keep an eye out for these. I think Panasonic are doing this.
Sorry, not much real help, just opinions.