Hi Sean! You're smart to be planning to make the most of your Disney Dining Plan credits! The easiest way to see the participating restaurants and the number of credits they require is on the Dining Plan brochure. You can find the 2012 Dining Plan brochure by clicking
here. The vast majority of restaurants at Walt Disney World require only one credit, but the Signature restaurants and the dinner shows require two. You'll see a "2" after the restaurant's name on the brochure if two credits are required.
The reservation webpages for each of the restaurants usually have a pop-up box that specifies the number of Dining Plan credits the restaurants require, but we've had some problems with the information on those boxes lately, and it appears they've been temporarily removed from the website. Thus, for now, check out that Dining Plan brochure instead.
If you have more questions, please don't hesitate to visit me or my friends here at the Moms Panel again! We'd love to help!