Not yet. I've just restarted my compost after my wife killed the last lot by accidentally contaminating it. I'm planning a worm hunt with the kids in the family on the weekend :)
I don't flip mine often enough, but I'm always happy to see a bunch of squirmy buds every time I do. I've been toying with the idea of intentionally farming worms for castings, but that's also one more thing on the pile of Things I'd Like To Do