VideoEgg, which runs an ad network for social networking applications, says that it's pulled in $1.5 million in ad revenue from some 150 apps, which includes top Facebook embeddables like Scrabulous, Warbook and Flixster since August 2007.

VideoEgg founder and CEO Matt Sanchez says, "Aggregating more than a hundred application owners in our network gives advertisers the reach they need to go deep into any demographic. Reaching the $1.5 million mark is a testament to VideoEgg’s ability to enable developers to monetize their content."

But as Mashable points out, "The bottom line is that $1.5 million in revenue over 5 months for some of Facebook’s top applications simply does not seem like much, especially when you consider that MySpace is estimated to pull in $800 million of revenue this year."

Mashable also notes that there are no specified CPMs to go with the data, but a loose guess about install bases might lower the value of user downloads quite a bit.

[Mashable | How Much Money Are Facebook Apps Making? Not Much, Apparently]