They won't shut down the Bnet server for Diablo 2 before they close the Diablo 1 server (and THIS I don't want to happen). --- I will not change this sig until Claymore is published in my country !!! (11/29/2007).
The thing with open is that the connection is done through your own computer, not through a blizzard server. That is why you are able to run mods and hack with out being caught. If your running through a router try disconnecting the router and going straight through your modem, if that is not a choice you need to do some port forwarding.