With new content consumption devices popping up faster than you can spell “i-P-a-d”, you surely will need some content to consume. How about a search engine for PDFs and eBooks. Live PDF (link here) lets you query Google or Bing (although not at the same time) via a single search interface for PDFs and eBooks on any topic. Your results will take you straight to the downloadable content, where you can whisk it from the ether into your internet-enabled reading device.
There are no filters, categories, sorting options or any other form of data / search manipulation tools on the page, but you can view the last 10 searches! Here is to hoping that one of the previous ten visitors was looking up stuff on the semantic Web!