Kurrently: Free Real-Time Search for Facebook and Twitter

Kurrently searches Facebook and Twitter for the search term or phrase of your choice. The real-time results come in a stream that updates at the pace you choose–fast, slow or halt. The results page offers links to Google, Bing and YouTube; with a click users get additional results for the same search term.

While use of the search engine is free, subscribing to a RSS feed for a word or phrase is not.  Users are asked to pay an amount of their choosing.