Comment Kindle (Score 1) 260
Having a kindle and a tendency of reading more then the average geek, due to my Ph.D. work (I read about a Robert Jordon book and a half a day between work-school-pleasure reading, not considering websites and email). I love my kindle for pleasure reading, but find that it does not do a good job for academic or professional reading where one has to cite the work. The form factor works for me, where a DX would be a little too large. I can do about four page flips per second with my kindle, which isn't too bad.
The PDF function works for me since the firmware update, but I don't read game manuals or such. Mostly I read journal articles and vendor documents. I prefer to print those out, since my note taking methodology is kindle-incompatable. I am building summary of the articles I am reading for annotated outlines, so it makes sense to print for my type of work.
What I like the best about the Kindle is the portability mixed with readability and battery life. I have mobipocket on my windows phone and could be a pain at times to read, due to the eye strain and backlight sucking the life out of the battery. I use a book light, which has an advantage with regular books and journal articles. In all, the kindle works for me.
I do have the Kindle app for the PC, but it doesn't really work for me. I wished they did have one for the android phone, just when I can't take my bag with me.