TP I found this on Slashdot recently, it is a semi-regular contest for programmers:http://dinsights.com/POTM/Tcl is one of the languages recognized for entries. I'm sure there are at least a few Tcl'ers in Wiki-land that might like to submit entries. Be sure to post your bragging rights back on this page
AM (23 december 2004) Why not start a little contest of our own? With this extreme-daylength season there must be several minutes you can spare to think of a solution to the problem I post on Contest - finding repeating substrings
RFox (July 11, 2012) From the contest website:"The POTM is not currently active. It may return one day or it may not. In the meantime, feel free to browse the past problems and marvel over the clever solutions and forum discussions. And thanks to everyone who participated over the years - I hope it was as much fun for everyone else as it was for me."