I am a big fan of the wifi version of the kindle as I can use Calibre to download Irish & UK news papers and have them converted to a mobi kindle file which then gets emailed to my kindle. All this is achieved via 1 click.
A kindle has an associated email address. To send a document to your kindle you just email it as an attachment. I hope to exploit this feature and use it good effect for keeping up to date with developments in the sustainable energy tech sector which our students in LIT Tipperary will be exploring as part of our degree in smart sustainable energy