One of the problems I encountered with my original Gigabyte GA-P35-DS3R motherboard based hackintosh was the network interface. The Realtek 8111B chip on the motherboard didn’t work very well with OSX’s drivers, and a workaround was required. With Snow Leopard I used a modified version of ifconfig and a script to get the network interface working correctly with bonjour, so the useful auto discovery features would work (iTunes, Finder etc.)
This worked well but wasn’t very elegant, so I was happy to discover Lnx2Mac’s port of the Realtek Linux RTL81xx driver. I disabled the ifconfig script and dropped Lnx2Mac’s driver into /Extra/Extensions, and after running a few terminal commands to set permissions/owners and rebuilt caches (see step 6 here) it’s working great.
Thanks to Lnx2Mac for the work that went into porting this driver, and if it helps you out you can make a donation from the project page.