This board has
North Bridge: Intel® 945GC (good, very compatible)
South Bridge: Intel® ICH7 (good, very compatible)
Integrated Intel Graphics Media Accelerator 950 (works, very compatible)
IDT 92HD202 8Ch-HD audio (oops, can't find anything about that!)
Realtek RTL8101E 10/100 LAN (oops, only post I find are bad!)
I had a bit of trouble booting things up, at first. The DVD booted after I tweaked my BIOS settings based on this link: http://netkas.org/?page_id=26
I had no trouble partitioning the drive GUID, and the installation seemed to go well until the very end, when I eventually got a error saying the system couldn't be installed. After several hours of trying things I realized that the installer log messages sounded like it might have had some trouble with the boot record. That lead me to this topic: installing EFI v8
I was able to follow the simple instructions under "Method Number 2: Starting with out Tiger or Leopard," to install EFI and get the system to boot.
Once in, the system recogized the built-in GMA950 just fine, and I immediately had accelerated graphics and Quartz Extreme support, as well as all reasonable resolutions on my Dell LCD display.
However, I didn't have either Ethernet or sound working. I spent another hour or two looking for references to that Realtek chipset, when I had the bright idea to check the Realtek support site. What do you know, there's a Mac driver on the site that's supposed to support that chip under Mac OS X 10.4.10: Realtek support site
I downloaded and installed the driver and rebooted. Now my on-board ethernet works, too!
Things were working well enough now that I went ahead and installed some software, let Software Update download and install several updates, and got things set up the way I like them. Overall I'm pretty happy with how well this thing is working. Sleep even works, sort of. If I "sleep" the machine, it doesn't recognize any keyboard inputs to wake up, but pressing the power button wakes it up, and every thing works just fine after waking, so I figure that's probably good enough.
I think I'm going to just have to give up on that IDT 92HD202 audio chip and buy a USB adapter. Can anybody recommend a cheap one that works well with Mac OS X?
So, overall, I'd say that if you're looking for a really cheap Hack, the ECS 945GCT-M works pretty well, but definitely go with a v1.0, if you have a choice. The v3.0 I ended up with is not nearly as well supported.