Loved the Potato Pack ARG, I remember staying up late into the night playing games I'd never bother with under normal circumstances, but knowing I was working with hundreds or thousands of other people to try and release Portal 2 a bit early made everything so enjoyable. Ended up with a golden potato too. $200 worth of games (including Portal 2) for the $30 it cost me to get the potato sack? Totally worth it.