Does quoting you in a comment to your article count?
"Using OpenOffice instead of Microsoft Office is like eating organic food instead of conventional. It is not the experience, or the expense, or the convenience that matters. It is the knowledge that you are a better person for so doing."
I like this one -- you can make it either pro- or anti- Open Office just by changing the tone of your voice.
(Although I daresay the analogy would work better if organic farmers required you to come to their farm to get your food, but then didn't charge you anything, while conventional farmers sent someone round to your dinner table and charged you $300 a chair regardless of whether or not a) someone would actually be sitting in it or b) said someone would even want some of your famous green bean casserole.)
Keep up the good work, Verity!