Bellevue, WA-based BlueKai, an online-marketing data company, said today it has acquired TrackSimple, a media analytics startup also based in the Seattle area. Terms of the deal weren’t disclosed, but a recent filing with the SEC suggests the purchase price was about $6.8 million in BlueKai stock. TrackSimple was founded by a pair of ex-Amazon employees and raised a $2.5 million Series A venture round led by Ignition Partners in 2008. BlueKai has raised a total of about $35 million in venture capital; its investors include Battery Ventures, Redpoint Ventures, and GGV Capital. Xconomy first wrote about the company’s approach to providing Web-browsing data to advertisers and publishers back in 2008.