Possibly one of the best uses of a Kindle is to send long web articles to it for later reading on the tube or similar.
You can use the webservice klip.me to do this very easily.
- Go to klip.me hit the bookmarklet and fill out the settings form/follow the instructions
- Add the klip.me bookmarklet to your bookmarks bar
- Click the bookmarklet when on a web article you would like to read on your Kindle and it will sync to it