The key question here is size -- the more stuff you add, and the faster the lens, the bigger it gets. After a certain point, it no longer matters much. Whether you shoot a huge clunk like the 1DsII, or the Leica M8, if you're going to have a range of focal lengths, you'll have to carry an extra bag. And that, to my mind, is the dividing line between pocket cameras and enthusiast and pro cameras -- the bag.
To my mind, a pocket camera is one that you don't have to carry an extra bag for -- everything is on the camera except perhaps the charger, which you could pack separately. The Canon G7 has most of what you need in a pocket camea: it's very compact, with a compact charger and good low-light performance (if the low light performance is good enpough, you can get by with an f4 lens to cut bulk.) It needs faster data transfer and RAW and the articulated LCD; the previous version of it did have RAW, so that should be no problem; several small Canons, like the Powershot Pro 1, have had really good articulated screens, so that should be on the shelf, too. The Pro-1 also had a "L" glass lens. Data transfer might take a little more bulk, but the G7 is so small that it could take a bit more; and it also has a OVF in addition to the live LCD. Add an "L" quality lens, and 4x zoom from ~28-120, and I think you'd have to beat back the crowds at the camera store. The G7 sells for around $600, I think (can't remember.) I bet you could get this kind of upgrade for under $1,000.
JC