I've been hacking on Tomboy lately trying to become familiar with the code. I'm hoping to be able to add some nice enhancements to it eventually.
Today, someone showed me a cool little utility called TiddlyWiki, which is essentially a self-contained wiki built-in to a single HTML file. You can keep notes in it just like you would in Tomboy, create subsections (just like you would in a normal wiki), and have them link together.
So, I figured, why not? I spent this afternoon hacking together a little plugin that exports Tomboy notes as a new TiddlyWiki page. It actually ends up working pretty nicely. My only fear is that people will like TiddlyWiki more than they like Tomboy.
Update: Here's the plugin in patch file format (apply to latest tomboy CVS): tomboy-tiddlywiki-plugin.patch