If you like lists, and like to debate networking issues, Network World has a fun feature on "Networking's 50 Greatest Arguments." There are some obvious ones (Ethernet vs. Token Ring), some old ones (DSL vs. cable), some new ones (IPv4 vs. IPv6) and some that don't really seem like networking arguments per se (AT&T vs, the U.S. Justice Dept.)
Personally, I thought ATM vs. IP would make the top 50. It didn't, though the more general circuit switching vs. packet switching did. Go check out the list and see where your faves are.
Network World has this post