I have not contacted CE. I suspect you will get no information out of them. They are held by MidAmerican which is primarily owned by Berkshire Hathaway. The Z prospect is not large enough to be significantly material to the BH bottomline. Therefore, I suspect they would redirect you to FX's management. And FX has disclosed what it can disclose at this time. No harm asking CE though.
Patience is the name of the game for now. Sroda and Rusocin wells are the next big news as far as I can tell. Let's hope for something VERY positive on both!