
I have to declare an interest right away: I led the team which built the Pot Healers game on Numbakulla. The Island belonged to Moopf Murray, who has become a friend in SL, who ran an independent competition for a team of people to develop Numbakulla for six months, in which time he would pay all tier fees.
Seven teams entered, my team won. We spent four months building, developing and testing the game. When the Pot Healers Mystery opened, we had a few problems with continuous crashing, due to some change to the server code which luckily was fixed in the following update.
After a couple of months, Moopf reasonably wanted the island back ... but we had put in such a lot of work, and the players loved it soo much, that we didn't want it to be deleted and consigned to nice things that existed once in SL. Due to the generosity of a few players, we were able to buy the island. Since then, tier fee has been paid by donations.
I have been to Numbakulla thousands of times, and I hope it won't sound immodest to say that I love it as much now as I ever have. I think we built a lovely thing. Check it out.