Motorola has a couple of Linux based smartphones: A760 and A768. Check out the photos of the latest model, only available in China at the moment, on the excellent LinuxDevices website – a must-read for anybody interested in embedded Linux.
Motorola is not alone either, an earlier story on the same site describes NEC’s 3G Linux-based phone.
Of course, to put this in context, these phones are hardly low end devices. According to this article about the Motorola A768, it has 96MB of RAM. That’s more than I had in my desktop PC just few years ago. Still, these phones should prove that Linux can certainly fit into places where PocketPC and PalmOS can go, and bring all the advantages of a relatively robust process model OS.