Portable emacs devices

[Richard G Riley]

I wonder if anyone here can recommend a portable emacs device? My
current laptop is too big to drag around when I cycle tour. All I really
want is emacs as an authoring system but clearly wireless etc would be
beneficial if its a light, robust laptop we are talking. I would prefer
Linux as the OS underneath and have been considering the EEE but some
funny business with the batetry capacity have caused me to rethink.

http://www.engadget.com/2008/05/24/uk-asus-eee-900s-come-with-stunted-battery-longer-warranty/

But basically a full keyboard emacs device is all I want, preferably
with a USB port for later transfer of org files to my main development
machine.