Next Gen is the supergroup, that is. Sorry for double post. Just ask around for them. They usually have a member online.
Edit: Also, Virtue & Union are the only two servers with a large and accepted RP community.
http://www.virtueverse.net/wiki/Shadow_Mokadara
I have a somewhat new Mutant-themed supergroup called "The Mutants". Since returning the game, I was considering gearing them up again, but I can never be sure how much full-time interest there is in 'concept' groups outside of a handful of people.
Love me or hate me, it's still an obsession.
There's also just the option of "Pick a server, start your own and look for others who are interested." Depends on if you find the starting up of the group fun or not - some people complain about the lack of, well, much of anything at first - but get a group together and a steady time for group activities ("Mutant Monday Task force will be....") and that won't be a problem for long.
(You can also coalition with other groups to take care of the transport issue early on. I've volunteered coalitions with some of my sgs in the past.)
I was wondering if there any all mutant super groups? I have a few mutant characters i would have to find a home for. Also do any of these mutant groups do a role playing? just wondering.