According to Bashiok (source), a new Diablo 3 website update is due on Thursday, October 2. In this new update, fans will find out what was inside the cage as told in the Dune Thrasher tale.
This might be the last website update until BlizzCon. And if you were living under a rock, BlizzCon is in 10 days. (October 10-11th)
Please feel free to continue your discussions on today's update in that thread.
Thanks.