Right now we have Smart Folders for plugins with custom filters that work great, but I think it would be really useful to have something similar in the Media Explorer.
So say you wanted to create a 'Snare' database, then you would just add "snare" in to the filter box and any added path(s) would adhere to that filter and only show files with "snare" in the name. This would make it really fast and easy to organize databases. Just add your whole sample folder as the path, add the relevant filters, done.
I made a quick mockup of what it could look like:
Let me know what you guys think.