You know people are using your software when they build add-on functionality to it. His code (which seems to require pear) produces an HTML list from the tasks data which he uses to show the status of his development project, Clogger. As far as I know this is the first tasks add-on. If you build nicely separated functionality like this be sure to tell me about it.
UPDATE (2003-05-04): There is now a new and improved version available.
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