Octora: RSS Search Engine

Today I discovered a new search engine with the name Octora (I have no idea what this name means). This search engine is a little different than regular search engines. It only searches RSS feeds and not regular websites. I tried it and it was a great experience (I have only tested it for a few minutes). I found some interesting and new sites that I will add to my feed reader. I am not sure how this search engine really works. How do they find what you are looking for? Do you have to use the name of the site or the name of the feeds to actually get a hit? Or do they use metatags (and what ordinary search engines uses) and the results will only be the subscription addresses? Try Octora today.