YieldBuild raised a $6 million series B round led by Storm Ventures. Hummer Winblad, which put in the initial $2 million when it launched as HubPages two years ago, also participated. The company is in the process of changing its name to YieldBuild, a service that was launched last October to optimize display ads. As we explained then, YieldBuild:

. . . uses computer algorithms to automatically optimize your site’s ad spots with the most profitable combination of ad layout, style, and network. The system continually tests alternative configurations of layouts, networks, and color, looking for the highest performing ones.

YieldBuild competes with the Rubicon Project, which has raised $21 million so far.