<p>MonoDevelop 1.0 doesn't appear to have a code-formatter like Eclipse does for Java.  Is there a preferred shell script (or MonoDevelop add-in?) that you've found to work well?</p>

At the moment, source code formatting in MonoDevelop is marked as a future enhancement:
https://bugzilla.novell.com/show_bug.cgi?id=321946
In the meantime, you may want to check out Artistic Style for C# formatting:
http://astyle.sourceforge.net/
I'm planning to see how this might be wired up as an external tool within MonoDevelop.  If I get to that, I will edit my answer with the information.
UPDATE: I don't have enough reputation to leave a comment, so I'll make one here: Nice job, Dustin, and patch for MonoDevelop too :-)  I wonder how recent the version is that is included with Ubuntu... Either way, I'm glad you found something that works for you.