The Gaim project's source code package provides a plugin loader for Mono-based
plugins, allowing developers to utilize the Mono framework and associated
libraries when writing Gaim plugins. Unfortunately, this loader seems to be
absent from the Gaim package gaim-2.0.0-0.26.beta5.fc6.
A while ago I was told by upstream that the Mono plugin was broken. We also had
a serious problem with mono's selinux security context. For these reasons I
have opted to disable the mono interface.
If upstream indicates that mono is now considered stable, I will consider
enabling it again if somebody comes up with a good solution to the selinux
problem (not easy). See the gaim.spec for details of the selinux problem.