15 minutes later, I was resigned to the fact that I would have to buy a new shirt and this one was a 'house' - or in the near future 'burp' - shirt. Five minutes after that, I thought, "You know? I bet I could just paint a design with bleach to hide the spill. Two small brushes and five minutes later, there is a small, organic design on the bottom left of my polo.
To be honest, I am not sure how well this will take. It's getting it's own run through the wash tonight to test for color-fastness. I have already soaked the area twice in cold water to deactivate the bleach. For those in the area, see if you can tell which shirt it is.