You can also jailbreak most kindles. I picked up my first one a couple of weeks ago here in the UK and intentionally bought it from Argos (high street shop) rather than Amazon so that I'd stand more of a chance of the installed firmware being slighly older as the jailbreak currently available was patched in the latest version (apparently it happens a lot, someone just finds a new way around it).

Took about 20 minutes to have it jailbroken and KOReader installed, I can now wirelessly copy over books from Calibre on my Mac to the kindle and don't have to touch amazons storefront at all.