Usually when you think of gaming, a tiny screen and cramped controls aren't the first things that come to mind. But in the last year or so smartphone gaming has really kicked off as they get more capable hardware and developers find creative ways to use touch interfaces. So much indeed that Apple's iOS devices alone have already surpassed the Sony PSP as a gaming platform in the U.S., according to a recent survey, while closing in on the DS.

Sure, you can't compare it to the gaming experience offered by PCs or consoles, but when you're just looking to kill a few minutes, nothing beats the convenience of firing up a 'casual' game on your cell phone. Not to mention that other portable platforms charge around $15 to $40 per game, when Apple's iPhone, Google's Android and other smartphones offer popular titles for $0.99 - some are even free. We're also looking forward to seeing how well Windows Phone 7 devices integrate the Xbox experience.

So our question for you today is: Do you game on your cell phone? Be sure to share the games you enjoy playing and the platform you are running. Lately I've been playing Angry Birds and Cut the Rope on the iPhone - both really addictive - and I also fire up Flight Control or Sudoku from time to time.