I had a “T-Mobile MDA Vario II” (HTC TyTN 300) which was similar, and also had a collapsible stylus which lived in a little hole on the bottom. It was Windows Mobile, but it was great having the keyboard fully accessible (without that extra bottom bit the G1 had).
It looked like this, just less German:
I think there’s a lot of people who would be happy with a Chromebook in computer form, and those are also the market for Linux.