As previously mentioned, Wellington Perl Mongers hosted a 'HackOff' event this month. It was a fun evening with teams of programmers competing to solve problems quickly. The problems used in the live event are now available on the Wellington.pm site.
If you can answer all five questions in under 90 minutes you're doing better than our teams did :-)
Once I've had some sleep I'll take a look at the code that the competitors posted and see if it's worthy of a write up.