I am fairly new to this btw but I will try to answer your questions.
Paste my network config? Want a screen shot?
1: Management traffic goes over a dedicated 1GB NIC (one of the MoBo NICs)
2: vMotion traffic (this is for failover and migration right?) that is just on another 1GB NIC from the quad gig card. This also does all the iSCSI traffic.
3: VM traffic is not really managed as such. All the VMs are connected to 1 Vswitch which goes to one 1GB NIC on the Quad Card.