Host OS is Vista, Guest OS is Linux.
The host has 2 NICs: one LAN, one WAN.
Currently the guest only sees the LAN.
How can I get the guest OS to directly see and access both the LAN and WAN NICs?
In the vmware player directory is a little app called vmnetcfg. Run that and you can determine which host interface will be used -- and how. From there you can set up both for bridging if so desired.
Since you're on Vista, be sure to run it as admin (right-click, run as...)
vmnetcfg didn't work in my situation. Actual solution was to upgrade to VMWare Player 3.0 (from 2.5) where the NICs can be managed in the VMware GUI itself.