Here are FLIR E5 thermograms of a Makerbot Thing-O-Matic in action. The FLIR reported values (~200F) are off considerably the ToM's measurements (~200C). No attempt made to correct emissivity of the various materials, but still interesting.

Extruder, heated bed, hidden X-axis motor, and part being printed.

View from above.

Electronics with the power regulators and power resistor clearly visible.

Corners are warmest parts of the enclosure.

Since taking the other images, I've added a top, and now the printing area is completely enclosed. The enclosure is just a little warmer, but trapping the heat inside has to help with the drafts in my workspace.