Hello, i have the same problem.
I use a ESXi with an Server 2008 64bit Maschine on it. I can login into "vsphere" and "vmware go" so i can access the maschine successfully.
I installed W2K8 64bit and got no network adapters.
After i read that post i also tried to install several VMware Tolls, like vista 32 and 64, server 2008 32 and 64 and server 2003.
In all situations i got now adapter for my network. Its an "IBM Systemx3650 7979G51" I looked at the compatible list and found the IBM systemx 3650 Server.
I hope you can help me becouse it is really importBest regards from Germany.
EDIT: I tried a 2003 Server 32bit and the Networks works fine. So wicht driver do i need and what is wrong with server 2008 64bit