Somebody else suggested colors based on a regex search on the contents of the tracepoint but if you're going to have a tracepoint dialog (which I think you are and you definitely need), then just allow the user to set the colors on an individual basis. If you implement tracepoint "groups" (which has been suggested and I think is OH SO important!) then you can color all the tracepoints in individual groups by default so all the GUI tracepoints come out in blue and all the Calculation error tracepoints come out in red. The main thing with tracepoints IMHO is you want to not discourage people from putting tons of them in but you still want it organized so when there are tons of them, people are able to pull the information out of them easily. I think the color coding along with the groups and a tracepoint dialog would help tremendously.
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