This week's launch of Wikia Search is the latest example of a human powered search engine. Mahalo and Cha-Cha are two other recent entrants. This week we've seen a spike in daily visits to Wikia Search, as you'd expect. In my digging the thing that stood as interesting to me is Mahalo's growth. The following chart shows the weekly share of US Internet visits to Mahalo and Cha-Cha over the past six months.

Indianapolis, Ind. - ChaCha, a "human-powered" search engine, announced on Wednesday that it has raised $8 million in private equity funding and received a $2 million grant from Indiana's 21st Century Technology Fund.