I think I've identified all worthy candidates for mobo in my storage server to the below. The absolute minimum standard is at least 3 internal SATA ports and at least 1 GbE port.
I was hoping MSI had something good, but not one of their mobos has more than 2 SATA ports. This was a complete surprise and disappointment.ASUS AT3N7A-I
It's ION-based, which I don't really need because it will be headless, although it does come with CPU reducing that cost. But will that be enough of a benefit? Takes DDR2, which I prefer for now. $129.87Gigabyte GA-2AIEV-RH
It's AMD which is desirable, and has the AM2+ socket which will take some of the newer AM3 CPUs. Has 6 SATA ports (!), and PCI-E 2.0 x16 rather than PCI as is usually the case. (and was dictated by Intel) Takes DDR2, which I prefer for now. Eh, Froogle, NewEgg, and eBay never heard of it, so can't pin down a price yet.Gigabyte GA-6KIEH-RH
This takes the Penryn /Merom processors, and although I don't know what wattage range these are, I'll bet they're low. Has 5 SATA ports (Silicon Image, very good), but PCI, which may not be a disadvantage as most surveillance camera cards are PCI, although it's a ghastly 32-Bit/33MHz. But look at this, it also has a mini card slot (PCI-E x1/ USB 2.0) and a mini PCI slot (PCI 33Mhz), for other uses like a wifi card. Also an IDE connector, 2 Serial connectors, 2 GbE (WOL, PXE, AFT, ALB , SLA, 802.3ad, SFT), and DDR2, but Intel IGP which I will hardly use. An astonishing $178 without
CPU or boot device.