According to Dan Primack on peHub, Geni, the popular genealogy and social networking site founded by PayPal's David Sacks, just raised another $5 million in a Series C round backed by Charles River Ventures and The Founders Fund. In early 2007, Geni raised a total of $1.5 million in a series A round led by The Founders Fund and another $10 million is a series B round led by Charles River Ventures.

While Geni itself is a popular service, a lot of attention has lately gone to Yammer, a side project that grew out of the same company and which is a Twitter-like service geared towards enterprise users. It is not clear if any of the money raised in this latest round will go towards expanding Yammer.

What About Yammer?

Yammer's story is similar to Twitter's, in that both projects were originally nothing more than side projects. Twitter, however, turned out to be the more lucrative project for Odeo. According to the publically available data, Geni is still growing at a steady clip, however, while Yammer, following an impressive growth spurt after its launch, is in slow decline.