Joining the club, I've had the same obsession with portables. The first portable device I tried to shoehorn Linux onto was a Fujitsu Stylistic 2300 from the late '90s (attempt made in 2001). From there I tinkered with the Sharp Zaurus series, the HP palmtops, and the Netpliance iOpener "web appliance", which I had running Slackware Linux. I carried that contraption to college and used it as a demonstration of the power of Linux to my NA instructor's delight.

I always wanted the eMate 300 having never owned a Newton. I also was a PalmOS fanatic from about 1999 through the late 2000s, with my first "smartphone" a Treo 650 after having owned over a dozen Palm devices previously.

I had an eMate 300 for taking notes in college (2006-2007)! I replaced the batteries and put in a wifi pcmcia card - it got like 24 hours of battery life and was super rugged. It was really great as a distraction-free school machine.

Young John Connor used an Atari Portfolio for that ATM hack [1]

[1] http://www.ausretrogamer.com/arnie-and-the-atari-portfolio/