Didn't find any mention of this, but I got an exciting email just after booking SFO-IAD-SFO for later this month.

Dear Cricketer,

United® is pleased to introduce the new Choice Menu, offering an array of fresh food selections and premium beverages on flights between San Francisco and Denver, Chicago and Washington Dulles. Beginning May 5, 2009, customers in United Economy® can purchase fresh breakfast, lunch and dinner offerings, as well as snackboxes, a la carte selections, and premium beverages.

Based largely on customer feedback, the new Choice Menu is designed to offer our valued travelers a unique onboard dining experience with exciting new menu selections. For all onboard purchases, United proudly accepts Visa and other major credit cards including MasterCard, American Express and Discover, as well as debit cards with the Visa, MasterCard and Discover logos.

You can see the allegedly new Choice Menu online.

I guess there's a sandwich instead of a wrap, but I'm not sure what else is different. The odwalla smoothie, perhaps? I wonder if this is the result of that food pricing survey from about a year ago.