Gang of Peas Games have released a new solitaire variant: Forty Thieves. In it you play the standard game of solitaire but with 2 decks of cards, so there are 8 foundations in total. There's also a developers 'making-of' blog post too.
Forty Thieves Solitaire
The game of solitaire played with 2 decks at once - plus the developers making-of article.
