Computer upgrading

I'm looking to build a new system. I'm favoring a dual dual core Pentium D system. I can't seem to locate (on Newegg) motherboards for 2 processors. I've asked this question in another thread but the conversation in that thread is more of a battle between Intel and Athlon. My question was buried and not answered. Not sure if no one knows or if the debate in that thread overlooked the question. Can anyone point me in the right direction for 2 processor motherboards (Intel of course)?

Thanks!!