I have not seen any motherboard with dual DVI out, unless it was a specialty board, like HP's media center. (damn fine computer).
If you need 2 DVI outputs, I might recomend a low power video card that supports 1 more DVI + Svideo. You can get one off the PCI/PCI-e slot for $30 bucks (really low end).
But if you go that route, you might want to look into a hard that support HDCP with HDMI out? You can buy an HDMI to DVI converter for $6 and then when you upgrade later in a year or two, you will be set!