Rollyo.com is a new search site (still in beta), from Yahoo. At Rollyo, you create a personalized list of sites you want to search in certain circumstances. For instance, you could create a list of your favorite sites for current news, and search only those sites when looking for late-breaking stories. It’s a surprisingly helpful site. My firm has several Web sites, and I made a search list of them. Now when I’m trying to remember if I’ve written an article on some subject, I just have to make one search.