After restarting the router with default values, the UPnP port is now 15722. When I launched Aquisition for the first time, it seems to have added 6346 and 6347 to the list of uPNP ports as well.

In LimeWire, I have it set to use UPnP and 15722 is the listening port. Seems like it's set up right, but still all I still when I view the "Connections" pane all I see is:

(0 Ultrapeers, 0 Peers, 0 Leaves, 0 Connecting, 0 Standard)