Peter, what differentiates RubyFlow? I like RubyInside because you cherry pick relevant items and I like RubyCorner because it's comprehensive. Where does RubyFlow fit in?
RubyCorner is very good, but only covers a certain set of blogs. Sometimes those blogs post non Ruby content, so there's noise.
Also, RubyCorner does only cover blogs (not counting the video / photo sidebar) so you don't tend to get latest updates on libraries, and links to things outside of the Rubysphere. You also only get one link per hit, whereas on RubyFlow you can bind together a bunch of related interesting pieces in one go, or provide context.
Context is the final part. When posting you can write what you like and provide a little context to the links. This makes it a lot easier for you, as a reader, to know whether something is worth clicking. The problem with sites like Hacker News and Reddit is that you're going entirely on the headline. Sometimes you want more than a headline.. just a single sentence of context or a bunch of related links will do.
Hopefully that answers the question! Effectively RubyFlow's style is a cherry-picked, hand-written for context and quality alternative to browsing the social bookmarking sites, like Ruby Reddit : http://ruby.reddit.com/
Very cool, thanks for answering. I just checked it out and found a few nice libraries there I didn't know about, so it's already earned a spot in my bookmarks. ;)
By the way, if you have any ideas for other niches this sort of site could work well in, I'm all ears. The only two I'm personally interested in doing so far are Rails (separate to Ruby) and Python, but I think there's a wide range of people who might like to make such sites themselves.