I also have a question regarding the fh:incremental element. While the spec says it SHOULD occur, and it MAY be assumed "true" if the document contains a fh:prev element, it doesn't say how to interpret a document which has neither fh:incremental nor fh:prev (which is exactly the status of most feeds in existence). The most obvious interpretation would be to assume an fh:incremental value of "true", but if that's the case why bring up the issue of whether the fh:prev element is present or not?
On an unrelated note, shouldn't the default namespace in the atom examples be "http://www.w3.org/2005/Atom";?
