Display Ad Network Takes On DoubleClick

The technology of online display advertising is evolving rapidly, says Tim Cadogan, chief executive of OpenX. His startup recently received $20 million in funding led by the venture capital units of SAP (SAP) and AOL (AOL), along with two big Japanese groups, Mitsui Global Investment and Sumitomo's Presidio Ventures. It's now received $50 million in total funding. OpenX provides OpenX Market, an online ad exchange that enables live-auction bidding