I've tried out the custom search engines. Rollyo has a nice look, but I didn't like the way the ads were interspersed with the results. I'm a fan of Google, so I set up my own custom search engine in Google. Here it is:
I set up this search engine to search recipes on several of my favorite sites. It works great! Now, if I'm looking for a recipe, I can search several websites at once and limit to my favorites. Cool!