We have and had together 5 or 6 Kindles of different kind. 
I just received the new toy yesterday and was messing around with it....
It was easy to use and within 5 min I started reading some of my books. Just one problem: I viewed my pdf inside the Kindle and the font were not look as solid as it compared to other real E-book's font, e.g user guide from Amazon, I guess this is a problem of pdf format itself as it needed to scale to fit the screen.
Anyone has this experience? How to improve this?

Or any conversion tools you guys are using?