Sources at motherboard maker MSI claim a Socket F dual board with two HTX slots will likely be launched in February 2006. Asus has two and four socket versions, both of which have dual HTX slots.
And Arima is showing off its SW320 which has both HTX slots and socket 940 slots.These boards will come in at $250 with support for up to 8GB of memory.
Other interesting boards include an Asus ATX S939 board which supports Athlon 64 and Opteron 1XX, with two PCI-X slots, two PCI slots, one PCIe 16X, ATI Rage onboard, and four plus four S-ATA. Four of these are based on Nvidia's chipset and four from a Marvell S-ATA 2 chip.