http://stackoverflow.com/questions/2170528/writing-hello-wor...
http://stackoverflow.com/questions/2260294/awk-print-2-1-in-...
http://stackoverflow.com/questions/1642184/extracting-urls-f...
http://stackoverflow.com/questions/2032503/getting-stock-pri...
http://stackoverflow.com/questions/1541682/lisp-script-to-pa...
http://stackoverflow.com/questions/2264286/generating-a-quiz...
http://stackoverflow.com/questions/2263983/processing-comman...
Now I'm back and still throwing out a few as I think of them.
http://stackoverflow.com/questions/6172054/how-can-i-random-...
http://stackoverflow.com/questions/4640040/how-can-i-generat...
Basically, the HN crowd could help make short work of building a great starting point for less popular topics like Elisp, Haskell, Scala, Scheme, CL, etc. One technique that is particularly useful is to solve small real-world problem.