Summary: I had good luck with Intel boards in the past. I guess that it was luck. This board was nothing but trouble. After several frustrating days of dealing with it (I could never get it to boot) and the Intel "help" chat line, I returned it.
Summary: I have been purchased the first DX58SO MOBO on february 20 with the i7-920, then few weeks I received them at my place (I live in Venezuela). Firts all work nice and well at firts boot. The Windows XP SP2 was installed without problems (in 18min).
Ask them to ensure bios is updated before shipping.
10 July 2009
Summary: Bios was not updated to most current version. Would not take the cpu I bought to use it with until bios was updated. Fortunately I had a lower end cpu for the same chipset and was able to update the bios and then use the Xeon cpu.