Is there a feature by feature comparison available anywhere broader than the one on Wikipedia? http://en.wikipedia.org/wiki/Comparison_of_video_services The entry is very useful but maybe there are a few columns of interest missing such as posting to off site urls, aggregation options, channel players, RSS feeds, etc.
On regard to sites, I've just gone back using the Miro player -- the old Democracy Player on my desktop -- http://www.getmiro.com/ and the visual experience is excellent.Top quality tv. As well, the platform isn't as clunky as it was a few years back. It still has a great access & open philosophy to its services.So if you are touting your feed don't forget Miro. dave riley
