I was reading Matt Hall's Discraft player profile and came across how he talked about throwing grenades with a bonapane grip (disc gripped upside-down between the index and middle finger) over the thumb inside the disc grip. I haven't tried it, but I did hold a disc that way after reading that and it feels really good. He says you can get more distance with that type.
Okay now I'm looking for the how-to's of the grenade shot. What works for you, disc wise, grip wise, anything you can give me. I think it'd be fun to dial this one in. I think I just like the idea of adding another trick to my bag...I like being a tricky player. :-)