Casio, Canon, and Nikon have each announced 3MP cameras recently; but the Nikon Coolpix 990 ($900) nudges past the cheaper Casio QV-3000EX and Canon Powershot S10.
The Casio QV-3000EX ($700, or $1000 witha 340MB microdrive) is a good option, but feels cheaper. The 33mm (f2.0) -100mm (f2.5) (equivalent) zoom lens and ISO-equivalent options of ISO-100, -200, -320, and -480 are similar to the Coolpix 990 which only goes to ISO-400 but also has an option for the camera to select the best value. The Canon Powershot S10 ($700) shares the same selection of ISO settings as the Coolpix 990 (100, 200, and 400) while lacking its automatic option. The Nikon Coolpix 990 otherwise feels quite similar to its predecessors, sharing the same body and lens but losing its GPS capability. The Coolpix 990 also retains its useful "best shot selector" mode which is useful when forced to use a slow shutter speed. All three cameras support connecting to a PC via either USB or serial ports if necessary.
The Canon is the smallest of the options, but sacrifices the extra focal range of the cameras, with a 35mm equivalent of only 35mm (f2.8) to 70mm (f4.0). This could make the Canon S10 good option as a camera to slip in your bag just-in-case. Unlike the larger Casio and Nikon, it does not use standard AA batteries, meaning you will need to pack the proprietary charger if you plan on taking it on longer trips. It is also the only camera of the three that records only JPEG images as the other two provide an option to save an uncompressed version (although this is hidden on the Casio).
The Casio QV-300EX feels like a bit of an odd-dog in this bunch, as it has some features of each of the other two. The Casio and Nikon both provide the control of a higher-end camera, providing for manual exposure control while the Canon S10 lacks both shutter and aperture priority modes, supporting only full-automatic. The Nikon is left-out when it comes to assisted panoramas, where the camera will help you take overlapping photos which can be stitched together later on a personal computer. The Casio QV-3000EX also shares one other element with the Powershot S10: both have lenses made by Canon.