Urgh. I really like the ICFP Programming Contest. Each year they've come up with an interesting challenge, and I've wanted to give it a go.
Unfortunately, they always hold it right before the Sylvan Annual Conference, when I'm up to my eyeballs in work.
This year' challenge kept nagging at me, and I kept having ideas I wanted to try, and I had a little breathing space, so I broke down Sunday afternoon and started coding. At 9:30 this morning I submitted it and flopped into bed. Thus the "Urgh" :-)