Today at our Social Currency CrunchUp (which is currently being livestreamed here), Blekko founder and CEO Rich Skrenta gave the first live demo of the startup’s innovative search engine (be sure to check out our initial review). To mark the occasion, Blekko is giving out an invite to 500 lucky TechCrunch readers — just be one of the first people to email a message requesting an invite to techcrunch@blekko.com.