One of my clients is a very successful online prescription business. The handful of Perl programmers that had coded version 1 of their site (being used daily for thousands of hits per hour) thought they were out of a job when some PHBs hired 30 Java programmers to write version 2.
Time passes, Version 2 is slipping one week per week near the deadline, even though promises were made to the investors to have a "new site online soon". Lead Java guy goes over to the Perl guys (still maintaining version 1) and says "can you mock up these new looks on your existing codebase?" Perl guys code the entire thing in a long weekend, and "version 2" goes live. Live, not just mocked.
Java guys all get the axe.
Amazing. This stuff needs to get out there more. Too bad I don't have permission to reveal more details.