Kind of old but there is one, http://andrew.huang.usesthis.com/
Interesting, he mentions that he'd love to have a triple screen capable laptop, but then when he has a chance to make his own it has two possible monitor attachments. Or did I miss something? Anyway, with USB->hdmi adapters this may no longer be as much of an issue.
For instance:
http://www.newegg.com/Product/Product.aspx?Item=N82E16812119...