This is just me,
1) Batteries..........get one that will accept standard batteries in case you get stuck somewhere and can't recharge your proprietary lithium pack.
2) Buy a camera from a camera maker. Stick with Olympus, Nikon, Fuji, etc...........not Casio, Hewlitt Packard, etc.
3) Lens quality and size CAN be more important than CCD size. My 2.1 MP Olympus C2100 outperforms most 4MP compacts.
4) Identify how you plan to use your camera.....casual snapshots, hostile environment, SERIOUS photography, etc. Like I said, I have an AWESOME digi cam, but I usually use my wife's cause it is compact and cheap. My next will be a water resistant compact.
5) I have not been following memory card technology, but as long as you can get aftermarket cards and can buy a reader for your PC, then I think all types are fine.