Topsy.com is one of the best real-time search tools available. It is one of the last still standing, surviving Google’s own realtime search effort, and third parties like Collecta. A search on Topsy will return results from blogs, Twitter, and Google Plus (Google+).
Techcrunch reported this week that Topsy has launched a mobile site, at http://m.topsy.com. This is a great complement to their normal Web site search, making it easy to quickly look up an expert or discussion even when you don’t have access to your computer.