Yeah, I've been on a couple of those. It was XP, technically, not scrum, but we did sprints and user stories and story points, and we had a product owner, and we had a guy who was de facto the keeper of the methodology. It worked really well, too.

And no, it wasn't just crud apps. It was a distributed security auditing tool. Yes, it had a database component, but it was much more than that.