I recon that like other P2P programs you could add a + sign to each download, you could be able to see what program each user is using, how fast they are uploading to you and maybe their nickname or something.
I think that would be cool so you can see who your downloading from and whoever gives you the most speed you can give them upload priority!

Also about the + sign, this should be added to the search results too, see how much percent the users have of the file, see what name theyve given it on their comp (just out of interest and so you dont endup downloading a file that 1 person has misnamed).