I've been something of a fan of Bang! (the card based chamber game) but I've always thought it a shame you couldn't play it on your own. It was therefore not with a little excitement I caught up with Ed Stephens' Board Game Review blog and read about Bang! for the iPhone.
As Stephens rightly describes Bang!:
However, iPhone Bang! grants you a host of new ways to play and one of these is computer controlled opponents:
I'd like to see more of these cross-platform multiplayer modes. Ideally with both the current DSi-ware and upcoming family 3DS games, although I suspect Nintendo's reluctance in the online space may derail any efforts here. In fact it could well be with this sort of functionality that Apple can out deliver Nintendo in terms of gaming features.
While I'll always have a soft spot for my battered old version of Bang! the iPhone version has certainly got a lot of use recently. It's also been a good way to introduce the kids to one of my favorite games.

