I recently got hold of a HP h5450 iPAQ
[http://pandi.itrc.hp.com/busprod/LCoverview/0,12441,series=96475^type=64929^category=215383,00.html?lsidebarLayId=106&rsidebarLayId=235]
with built in bluetooth [http://www.bluetooth.com/] and WIFI
[http://www.weca.net/OpenSection/index.asp], to work