Just found Socialmention – billed as “realtime social media search and analysis”.  I’m intrigued to find out more about their analysis – which provides 4 figures, covering strength, sentiment, reach and passion.

It lists top keywords, users and hashtags – which for the couple of examples I tried were spot on accurate.

You can set up alerts – and they offer a widget so you can display the buzz on your site or blog.

Update to my earlier post about realtime search.