Rollyo

I just rolled out my own search engine for Library 2.0. The idea of Rollyo is to create a new search engine based around a single topic or interest or set of interests. This would limit your search results to only these sites. This might be a useful tool for libraries, since they could then limit searches to sites that they deem reputable. The problem comes from the time required to make these search engines and then share them with other staff so that they can find only authoritative sites on given topics. I suspect that many will still use Google and filter through the advertisements and inaccurate sites using their prior knowledge and professional expertise. Could this be a way to assemble a group of sites that are useful and accurate but not subscribable via RSS? As more sites add RSS subscribability, there are fewer of these sites every day. Would this be a complement or a substitute for RSS? It would be useful if one could subscribe to a Rollyo search the way one can subscribe to a search for materials on a given subject using Aquabrowser and a library catalog; I was disappointed to note the lack of the little orange RSS or Atom or XML buttons anywhere in Rollyo. I can see some use for Rollyo in its current format, but I think I may not visit my search engine for a while.