Do you think there's still a market for feed readers? I've built one (not public yet) with two somewhat distinct features: 1. you get a river of news with the ability to perform complex search queries against your feeds; and 2. it provides relevance sorting of articles based on your reading history. I've found that search, when accompanied by tagging, provides a reasonable alternative to the folder-based feed management approach while relevance sorting helps cut down the time I have to spend wading through the never-ending stream of articles. Should I consider opening it for the public? I don't want to spend money on hosting and bandwidth unless there's a reasonable chance to recover some of the associated costs.