Just released my take on Solitaire games, its called Solitaire Engine. And it was built with an extensible scripting engine, so you can build and add new games. Hopefully some savvy users may do just that.
Its available at Handango. You can also visit my website at and download the demo version. The demo supports all the games and even addons, but only allows two different shuffles and some of the other features have been disabled.
I'll be posting a special addon (Blackjack) later today to show off the power of the engine.