Blew it up... GRRRRR!!!!!

Have you checked for valve spring coil bind and retainer to valve stem seal clearance and how much clearance is there? How much preload are you running? What lifters are you running? At what rpm did you puncture a rocker?

Now go into the garage and hit yourself in the head with a brick three times. :-D

Edit: Oh yeah, one more thing. Does it look as though it's slowly worn through or pushed through in one big whack?