I think nvidia cards are the only ones that can do that right now... Haven't figured out how yet... But I do have 7 nvidia dual monitor setups at my disposal... Now if people would only stop using them for work!!!
Also,
here's the cheapest dual dvi card I found on newegg, just because... Even though I don't have an LCD yet I sure wish everyone would start putting dual DVI on all dual monitor cards... I mean, why not?