+2
Custom Folder / collection thumbnails
I would love the ability to create a custom thumbnail for collections/folders rather than using a thumb from one of the submissions inside them (deviantArt subscribers have this option, I believe). It would be a nice way to manage collection folders that have a lot of submissions, or just a simple way to add consistency to one's own gallery layout.
Customer support service by UserEcho
This could be useful, but considering all the porn around, either the collections themselves need tagging (so the thumbnail would be blocked for certain users), or the collection images would all have to be SWF or something.