"Each successive release of the Treo line of smartphones has
increased functionality improved the convergence of PDA and phone
features. Being Palm OS based, the Treo line has had good Linux
support with the various utilities, application integration and
even development environments.
"Here at Guru Labs, our instructors travel all around the USA
teaching Linux classes. Nearly everyone who works here has a Treo
for on the road checking of email, using IRC while the 'airplane
cabin door is still open...'"