A Basic Twitter Search Engine

Using Google Co-op I created a simple search engine that scours Twitter. Feel free to improve on it. For simplicity sake, this bare bones tool excludes all RSS pages from within the site. It's also unfortunately not time based. I wish Google would let us create custom search engines using their blog search and other tools. Who's up for making a mobile version of this baby? If it's used, I will also publish a Twitter zeitgest.