Jim,
With regard to webvpn port-forwarding, once the user connects, there is a java window thats launched of the port forwarding part. The java window is launched locally from the PC. Its not pushed down to the PC from the ASA. Only the port forwarding information is pushed down.
webtype ACL is configured if you want the users to access only certain type of web sites or only certain networks on your internal site through the application/URL launch box.
IF you plan to use webtype ACL, you have to use the IP address that needs to be accessed by the client, not the 127.0.0.1 address.
Servers private IP address can be used if you are planning on using webtype ACL.
Hope this explains.
Cheers,
Gilbert