Crisp has a new entertainment campaign now running on the Yahoo UK mobile website for iPhone and Android phones. The ad begins with an animated banner, and once expanded the panel offers four ways to interact with Sherlock Holmes 2: A Game of Shadows. First, users can swipe to change characters from Holmes (Robert Downey, Jr.) to Watson (Jude Law). In addition, they can tap to watch the new trailer or to visit the Facebook fan page and Twitter account.

"What one man can invent another can discover." - Sherlock Holmes, The Adventure of the Dancing Men

We'd like to share a new campaign that is currently running on iPhone and Android phones. This ad from Digitas for the AMEX Delta card features animation, a tile puzzle game, tap to video, and tap to microsite to encourage mobile users to "Find a Solution to Easier Travel."

AMEX reinforces its message of easier travel through a tricky tile puzzle. Users shift the tiles around to solve the image of a smart AMEX traveler, or can tap the AMEX Delta card for an instant solution. Once the puzzle is solved, a new panel showcases a few of the benefits of using AMEX to fly with Delta. Users can opt to learn more by tapping to a video or visiting the AMEX mobile website.

Good luck puzzle solving!

This week's featured ad highlights a rich media campaign for Hitachi. Crisp partnered with creative agency Gotham to bring this ad into the Bloomberg Businessweek app for iPad.

Discover more about Hitachi's environmental solutions as you guide your finger along a dotted path in this touch creative for iPad. Each "step" activates a pop-up offering bite-size information on a specific Hitachi initiative, which you can chose to opt out of and keep going. Once you've swiped through to the end of the road, you can revisit any of the pop-ups you passed along the way or tap for the Hitachi microsite.