This looks really good. I love the idea of being able to information on a webpage or article and be able to set it up to read later by sending it to my Kindle. The tool is free and only works with the Kindle. Kindlebility is a tool that will allow you to send articles on the web to your Kindle, needing your Kindle email address (email@example.com). It does not store your Kindle address or use it for anything else.
You need to install the Kindlebility bookmarklet in your browser to send an article to your Kindle for reading later. Click here to get started by entering in your Kindle email address and then drag the bookmarklet link to your Bookmarks Bar in your browser. When you find an article you are interested in, click the bookmark and it is sent direct to the Kindle, reformatting as necessary.
There is a good how-to and why page worth looking at before starting.