Personally, I much prefer the skipstone browser (hack by @baf):
http://www.fabiszewski.net/kindle-browser/
In fact, aside from sporadically crashing, it is usable enough to do a lot of MR'ing-on-the-go.
It also allows downloading any file, but you will have to specifically choose the right folder.
You also get a bookmarks toolbar, and you can set a homepage.