HardwareZone took a look at the Intel 915P Express chipset based motherboard which also supports ATI's Crossfire:

ATI's CrossFire technology has been around for a little over half a year now, but there is still a lack of availability for both CrossFire graphics cards and CrossFire ready motherboards. While both the AMD and Intel camps have strong SLI support in the form of NVIDIA's nForce4 SLI family of chipsets, we only have a trickling supply of Radeon Xpress 200 CrossFire Edition motherboards up till now, but nothing available en masse. Intel has just launched their 975X Express chipset with native dual graphics and CrossFire support..



Link: Hardware Zone