As you have already noticed, stepmania online's server is currently down. I am temporarily hosting one. If the server does not come back up soon, the users, kaya/barX are willing to host one of their own with SMO code. Until then, you can connect to my server.
Before I post the IP, I want you know this. If you intend to use this IP for hacking purposes, I will shutdown this server and no longer supply it. I am doing this to be nice. Please be nice as common courtesy in return. Other then that, enjoy the server.
(no longer available)
edit: Note that your scores will NOT save. This server is to just play with friends. :)
edit: I want to make a list here of all the servers. Give me a few minutes to gather info and stuff...
My Server: (no longer available)
Jousway's Server: smo.jousway.co.uk
X-treme's Server: k.brb.dj:25566 (Registration: http://k.brb.dj/smo/)
Kc's Server: arnim.dyndns.org (Registration: http://arnim.dyndns.org:5555/smocp/)
SMOJP's Server: smojp.ath.cx
kitty's Server: xdk2.net (TeamSpeak3: xdk2.net)
crimsoncarnage's Server: crimsoncarnage.ignorelist.com (Registration: http://crimsoncarnage.ignorelist.com/smonline)