Small guide on How to use WASTE -> http://www.cs.montana.edu/~huff/waste/howto/Waste.html
WASTE was written in Java and was sort of tricky to setup / understand. At one point about 10 years ago, I had a small 8 person "dark net" running with WASTE, shit was so 1337 for its time.
Bit torrent was just making waves around this time and made downloading WAY faster, but was more risky then sharing directly over WASTE.
Edit: Can't find a mac client/server of WASTE. And some of those download links seem to be down.