Running Linux on an iPAQ

Put a penguin in your pocket

http://www.ibm.com/developerworks/linux/library/l-ipaq/index.html

Summary:  Installing Linux™ on your iPAQ can be a great 
way to breathe new life into aging hardware or make an 
existing tool even better, particularly if you are a 
fan of Linux on the desktop. You can leverage your 
existing knowledge and enjoy the benefits of familiar 
(pun intended) free and open source software on the move. 
In this article, learn how to turbocharge your HP-Compaq iPAQ PDA with Linux.