It's nice to see that research on UPnP is still going on. Rapid 7 just released result showing that 81 million IPs still respond to UPnP requests on the internet.
Nice work Rapid 7!
For those who are curious... UPnPwn is not a dead project, We've just been buried under other projects (for a long time.) We're hoping to put together some updates in the coming months.