Pricey but...
Useful app for quick easy visualization. Works great with Hitchcock. Could go for a few sutble interface improvements. Perhaps the ability to use the tap focus feature of the 3G S camera. Wish the on board camera was a higher res for the longer lense simulation, but thats nit their fault. Still, I dont think many will go for the $30 price tag.
MuuZak about
Artemis Director's Viewfinder