A format for the name could be "filename_author". This way the first person to create a Pong game doesn't have what appears to be THE Pong, and it's not hard to tell them apart (___Pong and ____Pong look an awful lot alike, plus it could get bulky. Imagine if ticalc.org did something along those lines and think of all those quadratic formula programs.). Of course, this assumes the same person doesn't release two completely different versions of the exact same program.
Also, it could be set (I think) so that when a person submits a program, let's say Pong, the file created is automatically changed to Pong_author so the authors don't have to do it themselves. Also, the text for the link in the archives could still say "Pong", but the link would be to Pong_author.