Extracting meaning from the Web is a difficult undertaking. Keyword search skims the surface of contextual meaning that is locked in Web pages, Tweets and feeds. That's where semantic search comes in. The semantic web deals with looking beyond simple links that make up the web to understand a deeper meaning and context behind that content. The Ellerdale Project, which launched in alpha this past week, is hoping to add context to search by using semantic technology to power a real-time search platform. Ellerdale mines the real-time stream, including Tweets, RSS and the, to identify topics, messages and articles that link together based on content, not keyword. So If you looked up Sarah Palin on Ellerdale's site, you'd see a semantic graph of related content, such as Oprah Winfrey (Palin just appeared on Oprah a few days ago), The Republican Party and John McCain.