Some people have said that Scrabble for iPad is amazing. It sure is a cool tech demo. But when you look at the total price tag of that game, it doesn't make any sense whatsoever. [VirtualShackles]
This is of course assuming that the other players didn't already own an iPod touch or iPhone. So really, the cost would likely only be the iPad and the app, and the iPad would've been purchased, Scrabble or no Scrabble.
So, then I guess the actual cost would simply be the price of the app....at least in most cases.