I'm sure @chrismacolor and @brainix could do a better job than I explaining. But essentially, they're building a better Twitter search, using natural language processing and ideas borrowed from PageRank, to identify the most viral tweets for a search query.
It's very early on (disclaimer, I'm friends with the founders) but I'm sure they'd love to answer questions and get the PH community's thoughts on product direction!
CryptoPoops