To see it in action:
Crust.piefed.social (the Piefed development instance)
Not all instances implement it yet, I guess it depends how often they pull from the dev branch
Example of search for 'movies'
Indeed. You can also search a term and then sort by active users, or filter it by a feed. But I think there needs to be some UI cleanup on the feed drop down box as that is going to be really, really long as people on different instances make new feeds