Two news sources that I'd like to see added are memeorandum.com (the best algorithmicly generated news feed I've found) and drudgereport.com (whose politics I disagree with but it's a hugely influential site and I try to avoid trapping myself in a bubble).
I haven't found a news reader type app that handles those two sites, so I find myself wasting huge amounts of time hitting those two pages and trying to skim their entire link list looking for the couple new articles since the last time I visited, guessing wrong, and re-opening articles I've already read twice before. I'd love to be able to use your site to newsreader those two.
(Memorandum is tricky, as it groups related articles together because so many news articles feed from the same source report, and that greatly reduces needlessly redundant reading. Even if you could only easily add drudge, that would be a huge time savings for folks like me)