The video game World of Goo, who we've seen experiment in the past with models like DRM-free games (which did not suffer any worse piracy rates than DRM'd games) and a "pay what you want" model, is back at it again. This time, they've released the The Humble Indie Bundle -- they've teamed up with a few other games and released a five game bundle with the "pay what you want" model once again. In addition to the five games involved, two charities, Child's Play and the EFF, also benefit from each sale -- by default, the money paid is split evenly amongst the seven parties, but customers can easily tweak the revenue split as they see fit. The site's clean, simple payment interface is particularly impressive and contains an amusing easter egg if you try and buy the bundle for less than $1.

To promote this bundle, there's even an accompanying rap video:

In a similar spirit of transparency that we've seen before from Goo, real-time statistics about the sales are shared on site. Currently, the average contribution stands $7.89 -- higher than the $2 that World of Goo saw in its previous experiment. So, while Mike may still not be convinced yet that "give it away and pray" is a viable business model, it should certainly not stop faithful entrepreneurial minded folks from trying to prove him wrong.