I'm betting there isn't a single dual channel 478 board out there. Other than that, Intel's boards are usually among the best for Intel chips. Very solid, if maybe a little lacking in features at times.
Otherwise, hit hardware review sites to get some ideas.
I'm in need of a socket 478 motherboad (Intel). It needs to have DDR SDRAM (400) compatability (preferably dual channeled). It needs to have AGP 8X/4X. Anyone know of any for sale?