Tomboy is great. It’s a small app that accepts your input, and creates an In-app wiki. Sometimes, I’m on a machine with Tomboy; sometimes I’m not. But I’m almost always near an internet connection. So I wrote a script to synchronize between a MediaWiki installation, and Tomboy. It handles local and remote deletes, renames, edits, etc. I’ll be releasing the code on GitHub in the next few days, so you can look for it there.
Edit: Code posted!