I'm in the same situation as you. Ethernet works at 1Gbit without any problems. I can see samba shares on Finder, and access them. But, for example some apps which use Bonjour, like Cyberduck or Things, can't see any shared resource.

I will try R1000.kext when I'm at home and report back.

I'm using the same kexts as you, but also sleepenabler and disabler. Otherwise, sleep doesn't work on my setup.

Cheers!