Actually I was running the 939 Dual SATA mbd for ~18 months and had no problems with it. My old Barton was getting a bit dated for gaming but the X800AIW was still a good card (and a xmas present from the folks) so I looked for a 939/AGP/PCI-E board. The only reason I'm not using that build anymore is that the water pipes burst and my room flooded into my desk's corner area.
At the time AsRock was owned by Asus, don't know if that's still the case. Their boards are solid in my experience, not too great for overclocking but very flexible when making the jump to "current gen" systems.