title: How does pubsub work in OpenSocial?
body: <p>I'm trying to design an application based on the <a href="http://en.wikipedia.org/wiki/OpenSocial" rel="nofollow noreferrer">OpenSocial API</a>, and I'm uncertain of how the <a href="http://code.google.com/apis/opensocial/docs/0.8/reference/gadgets/#gadgets.pubsub" rel="nofollow noreferrer">pubsub</a> apparatus will work.  This appears to be analogous to a Unix pipe, or perhaps an RSS feed.</p>
  
  <p>Is a channel persistent across browsers / computers?  That is, can I subscribe to channel "x" on browser A and publish to "x" on browser B, and have this data be read in browser A?  If not, is there a convenient opensocial method of accomplishing the same thing?</p>
  
  <p>Also: if one gadget subscribes to a channel after data is published, can that data still be read?</p>