HI all
this is the 1st time for me here in this talk, so as I got some experience with my N900 so, regarding your question about kindle
I found some way around by"
1. download "Mebook" application from repositories on N900 which can open EPUB file formats
2. download and install for your PC "calibre - E-book management" program, by the way this is an Ebook format converter and open source program
http://www.calibre-ebook.com
so you can convert the format you want on your PC to EPUB format then download it to N900 and now you have kindle like program on your N900

I hope that this can help you