Hey- I'm one of the co-founders of SocialRank.com.<p>We built graph search for Twitter --> allowing you to search your followers by location, interests, verification, bio keywords and more. It is really powerful.<p>It is great for brands looking for people but also really good for recruiting (search "engineer" or "developer" in bio keyword) and business travel (filter by a city when traveling there to see followers ) if you have a decent existing follower-base.<p>We will be rolling out more networks and more filters in the near future. But, I'd love the HN-community feedback!<p>You can also email me at Alex@SocialRank.com.