Hack day london
Last weekend, I was at hack day London, and I'm only just getting around to mentioning it here. Chris Gareth Mirona and I made Twitup - it lets you comment on in-progress TV using twitter, extracting the channel name from your message and assigning it to whatever's on at that time. In theory.
It's written in Perl and built on Catalyst, which I haven't touched in quite some time, but is still tremendously easy and fun to use. (We were going to built it on rails, but then it turned out that none of us had any idea how. So we used something we understood..)