These are what I was able to snap before I ran out the door.
This picture shows where the board was getting hot (top of the USB ports):
These two pictures show the damage to the USB WiFI plug:
I tried plugging the RPi back in after a while and put my mouse into the same USB port the WiFi was in and I felt no noticeable heat gain after about 30 minutes of use. The WiFi adapter was only in for 5-10 minutes, based on this test (and the only visable damage) it seems that there is/was a short in the USB WiFi plug, but I would want to confirm with another test using a higher power requirement USB item.