the other way to do it would be like freenode: do it quickly without understanding the risks... they used the same SSL cert for every ircd, then they got hacked, and with no PFS, all their past SSL'ed IRC is now effectively in the clear.
we are now actively working on the problem for server links, but ultimately believe that having ssl for client connections at this moment in time adds little value: https://www.quakenet.org/articles/99-trust-is-not-transitive...