Nokia N-Series: The Nokia N770 and N800 Internet Tablets feature the Internet Tablet Operating System which is a debian-based Linux distribution maintained at Maemo.org. The N70,N80, and N95, however, still use Symbian.
Internet users have developed interesting uses for the small Nokia internet tablets.
Archos: The Archos Personal Media Players feature Linux and have available accessories that facilitate more robust usage than simple media playback/recording. While wifi units exist, they all unfortunately lack bluetooth.
GP2X: This portable video game console is Linux-based and can be mounted in a usb cradle, opening up a wealth of opportunity for developers.
Read more about Linux-based portables in the next part of this Linux portable device series.