Today I released my newest hack. It is a crude 20 pixel thermal imaging experiment. It works much better than expected and it is probably the cheapest Arduino based TI system so far: http://blog.blinkenlight.net/experiments/measurements/thermal-imaging/.
Now mount it on a servo and scan 360 degrees :) (is that possible?)
What shows up if you hold a (burning) match nearby?
Depends on the distance. It can not "see" but it can "feel" the heat.