Forgive me if this has been mentioned, I tried a search and couldn't find it...
I'd love to see a Plugin Gallery integrated into PDN similar to Firefox's "Get Addons". I understand that it'd be more overhead, but it'd be a godsend if you could pull a list of current plugins directly into the app and then choose to install some or all of them.
While the lists in the forums are good, it's often difficult tracking down a particular plugin and making sure it's the right version. And it'd certainly make life easier for non-technical people (all the Moms & Pops out there who have it installed).