Here's an observation. I'm finding that in the wild, many advertised feed URLs do not match the "self link" URL contained in the feed content.
E.g. My own PSHB enabled toy blog advertises the URL as http://pushituphill.blogspot.com/feeds/posts/default However in the feed content I find <link rel='self' type='application/ atom+xml' href='http://www.blogger.com/feeds/51568063726361007/posts/ default'/> This causes me a minor problem for content distribution, since the feed URL from the content doesn't match with the feed URL that was passed to the hub. My immediate thought was that it would be nice if the PSHB protocol would pass me back the subscription URL, however, I can see that this wouldn't work for multiple content distribution. I currently have two solutions, that fit with the protocol. 1) Include the subscription URL as a parameter in the callback URL. This way I'm passed it back as a parameter. 2) Always subscribe using the URL from the feed content rather than the advertised URL. However sometimes these are no existent or wrong! Just an observation. Keep pushing on...
