Need some fresh e-reading material for your commute, but all out of e-books? Feedbook, a free RSS aggregator, takes in RSS feeds and spits out compiled PDFs in formats for pretty much any e-reader under the sun, including the Kindle, or you can create custom PDFs (with a free registration) for standard screens. The PDFs even come with a table of contents, and the site offers up a few free e-books of its own. Not every feed works all the time, including this here site's full feed this morning, but those that do come out looking surprisingly nice. Feedbook is free to use, but a free registration gives you a few more conversion options.