I have recently picked and begun experimenting with an Gumstix Overo Air COM (Computer on Module).
These interesting little computers are based on the ARM Cortex-A8 OMAP3503 Processor. The Air model that I chose to work with includes both 802.11g and Bluetooth wireless communication.
In the image below you can see the Gumstix Air booted from a micro sd card with and image of Linux version 2.6.36 and the GNOME desktop. This image also includes native development tools for c, c++ and python.
If all goes well I plan on using this single board computer in my future robotics projects.