Read above for what the awaiting sources messages mean.

The connections tab shows who you are connected to in the network. http://www.milkdrinker.com/GnutellaToadHow4.swf is a good gnutella primer. Very easy to understand.

You're not getting files because of your firewall. You have to go to the utility or software controller of your router, and tell it to open port 6346 and forward your NAT. Your manual that came with your router should tell you how to do that using your utility or other software interface.