NewsGator's got a new version of FeedDemon--this one is 2.6 Beta 3. It's not a complete version, however, so there are likely to be several bugs, and you'll need to backup your existing feed beta. If you'd like to avoid as many problems as possible, I'd suggest waiting until the complete beta version is available (something I should have done before trying out the early Firefox 3 release). Go here for the new download, and for details on backing up your feeds.
That being said, let's delve into the new features. A new folder called My Clippings has been synched with FeedDemon, which should help you keep track of your feeds and items a bit better. And the prefetch tool can now be set to include your clippings as well. A Cleanup wizard reminder has also been added to the subscriptions homepage, in case you forget to do these things. And if you'd like to keep your feeds messy, click the "skip cleanup" link to put it off another 30 days. Some changes and tweaks include page controls being moved back to the status bar, and several other fixes from previous beta releases.