After getting completely destroyed by the Eye of C'Thun earlier in the week we came back after vengeance tonight. Much strategizing and graph drawing prior to the raid, and a few hours of practice during the raid, eventually lead to us popping the giant eyeball and taking adventures into the Old God's stomach.
The second half of the fight is interesting to say the least. It'll definitely take some work, but I think it's in reach within a reasonable amount of time.
As an update to our other progress in AQ40, we pulled Ouro earlier in the week, with about 20 people. That ill-fated attempt obviously didn't go so well. C'Thun will likely be our primary focus; we'll worry more about Ouro and Viscidus once he dies.