One other device that I didn't even think of earlier that is similar to the 770 is the Sharp Zaurus SL-series...the main difference is the screen is vertically oriented, like a Pocket PC or Palm. They also have a slide-down keyboard that is extremely handy, and they have an option to rotate the screen 90 deg. like PPC's. As a matter of fact, the first time I installed an app (package) on my 770, it was like deja vu, because the SL-series installs apps the exact same way.

I still have my SL-5500 which was the original device in this lineup. 206mhz ARM, runs Linux, only 240x320, also uses Opera as it's web browser. It doesn't have built-in wifi or Bluetooth, but it does have both an SD and a CF slot to add memory or wireless cards. Battery life was only about an hour with a wireless card, so the 770 has been highly optimized in this regard.

Sharp has since discontinued these devices, but they live on because of the Linux community. The last model (SL-6000, I believe), had the same form factor, but had a 480x640 screen, 400 Mhz processor, and built-in wireless.