Google might currently have the hottest ad network around, but that hasn't stopped the competition from nibbling at the search giants heels.

Yahoo has announced that they will be acquiring the fifth largest online advertising network for $300 million. BlueLithium specializes in tracking consumer behavior as they move from site to site in order to serve more relevant ads, something Google is strongly opposed to. BlueLithium is only a three year old company, and has an impressive client list comprising of AT&T, T Mobile, Dell, Chase, Verizon, WalMart, AOL and Best Buy.

This deal is said to allow Yahoo! the ability extend their powerful analytical reports, provide advanced targeting and create innovative media buying strategies.

[via NYTimes]