FeedJournal Reader does not use the browser's cookies when generating
a newspaper, as the feed is fetched using Google's API. This means
that any feed you can add to Google Reader can also be added to
FeedJournal. It also means that feeds that require authentication are
not supported.
FeedJournal Publisher, on the other hand, supports cookies
authentication and is available for publishing your own newspaper.
Hope that helps,
Jonas.