randomErr writes "SearchEngineWatch.com was compared the good and the bad of both engine. They wrote the cool thing about Teoma is that its community-seeking behavior is both query-specific, and happens in real time. Whenever you type in a query, we're actually looking for the communities after you type the query. Teoma's approach differs from Google's, which uses a similar, but more static ranking system. It's also unlike the approach taken by Northern Light that classify web pages based on pre-defined categories."