A friend recently passed along two websites that I thought were genius...both of them with the same basic idea. They were created to help facilitate meal sign-ups. It takes the burden off of one person having to organize meals, which is often what happens in these situations.
Casseroles and lasagnas tend to be a favorite- what do you like to make to take to friends? Or do you just pick something up from a store? Pictured above is a casserole from Real Simple's 'Easy Casserole Recipes'...lots of them look yummy.
meal sign-up websites (both are free services!):