Keyboardr is an interesting website I found this week. It's a search engine that is a mashup of Google, Wikipedia and YouTube which as you type in the search bar, will find results relevant to the keywords typed. Once the search results come up, you can use your keyboard arrows to navigate and press enter to go to that website.
Since it's fairly new it's kind of barebones right now, but the concept is pretty clever if you're into shortcuts. They are planning to support Friendfeed, Delicious, Twitter, Flickr, Google Docs and many more.