I blame Jason Kottke for this one (as usual). He linked to this wonderfully addictive web-game the other day and I've spent far too much time playing it recently. It's similar to those "Pipe Dream" games of yore, but with something of a twist. There is no time limit, just a bit of chance and a bit of luck. As you keep playing, you'll start to develop a bit of strategy as well (and know just how likely you are to get back out of a corner).
Seriously. Do not click the link below if you have anything to do in the next 30-90 minutes. And yes, the image above shows my current high score:
» Found at: Entanglement