I would imagine they are pretty well spread out over various networks. You can check out this web page for general info and links to compare some other networks.
NO, its isnt totally down, i managed to get on last nite. I put a post in the connections area with the most recent update from DALnet admin, and at this time all any of us can do is wait and wish them luck in finding the attackers.
Not according to http://xgoogle.com/details?network=49 all server are dead. Imagine to relocate or regain user as before, many of our members has gone.. SAD... so SAD
Since i happen to be on a DALnet server as we speak, i must once again disagree with you. The site you meantioned i believe is checked once a day (altho im not positive about that) and with all thats happening, the status of any server(s) can change from moment to moment. It is more than possible that at the moment that website checked, there werent any servers up. Please also be aware that some of the servers listed on that site were delinked a good bit ago so would of course show as dead.
About DALnet having luck in finding the attackers, and wishing them luck, the kind of luck they need is a kind from a psychic to tell them who is doing it.