I am on channels dedicated to projects i am using:
#Node.js @ irc.freenode.org
#gentoo @ irc.freenode.org (also #gentoo-ru)
#perl @ irc.perl.org
#ru.pm @ irc.perl.org (russian perl community)
#anime @ irc.freenode.org (just old love :3)
Catalyst applications are very heavy, but i didn't found any problems in running catalyst application that i wrote year ago on latest Catalyst version.
Mojolicious is lightweight and easier to install, but its design is still under development, so API changes sometimes. Expect there will be not so much changes in new stable versions.