Thanks for the feedback, I was beginning to think my bot wouldn't attract any replies.
The plugin system is actually remarkably simple in terms of just loading and compiling the code for use by the system itself, in fact, I actually
blogged on the matter just a few days ago, in case it happens to interest you.
The case example is infinity and the code I used in it is actually the code that's used for infinity's code loading. In the latest darcs repo (which isn't published right now,) I've already fixed a few bugs and several shortcomings already, so consider this release somewhat a field test.
I have been rather busy so 0.2 isn't quite on schedule but I hope it to be out soon (at the very least, before school starts,) I've looked into a darcs repo on the code.haskell.org server, so even if it's not out you can pull the most recent repo (I'm quite religious about a repo always being in a buildable state when I push patches.)