- LG Phenom
- Palm IIIxe
- Handspring Visor
- iPaq H3600
- Zaurus SL-5500
- Sony Clie UX-50
- iPaq 6315
- HTC 8125
- Nokia 770
- Sony PRS-500
Before the Reader, I think the Palm IIIxe and the Nokia 770 got the most use as an ebook device. I'm still using the 8125 and the Nokia 770, but as a phone and webpad, respectively.
And out of my 10 devices, 3 run Linux. I find that awesome.
-Adam