[michaelhart]

I solved this a while back and posted my results on Twitter.

[SPOILER: DON'T FOLLOW IF YOU WANT TO TRY IT YOURSELF FIRST]

http://yfrog.com/mto4sp

I'm not sure if this was the expected output, as there was no exact confirmation. But I assumed it was right.

[drusenko]

That's not the end of the puzzle... It's also changed a bit since the last time you worked on it :)