I was finally able to get OSX running on my Atom based Intel D945GCLF2D MB. I ad to go back to Leopard instead of Snow Leopard for the moment. 10.5.6 installed without a problem, I was able to run the updates from within OSX, but after a reboot into the new 10.5.8 kernel, it panicked. I had to turn off hyper threading in the bios, then it booted, only seeing two procs. I put the older 10.5.6 kernel back on and turned on HT and all is fine. So I have the benefits of the 10.5.8 updates, but running the 10.5.6 kernel.
OSX sees fours procs now.
Now that I have a working Mac, I can play and see if I can get SL to work with this Intel MB.
I have not really done any testing with this Mac, but I am surprised how fast it is for a Atom proc with 1 gig of RAM.