In the FePy status update Seo Sanghyeon (FePy maintainer) explains the difficulty of compiling the latest stable version of IronPython with Mono. It is easier to compile IronPython 2.6 (the up and coming version), so hopefully we will see a new release of FePy - along with an update in Mono - when this is released later this year.
In the meantime the latest binary versions of IronPython released by Microsoft work with recent versions of Mono (although they need a terminal with a dark background). In this post Ali Afashar explains exactly what you need to do to get a cooperating version of IronPython and Mono working on Ubuntu.
This is just an instructional post with the hope that it might help others in the future.
I spent a long time trying to get IronPython2 running on Mono. Now IronPython1 ships with Ubuntu, so
apt-get install ironpython
, if that's all that you want. Ironically, I don't really know the difference between IronPython1 and IronPython2, but "2 has got to be better than 1", right?
The good news is that its very possible, but you will have to step out of your comfort zones.
You will need: Mono 2.4 (sources) and IronPython 2.0.1 (binary)