Not really. Software distribution is pretty cheap, especially if you already distribute over the internet. It certainly doesn't take 30% bite the way Apple does. I don't like license keys either, but we wouldn't need them if people didn't pirate software. Presumably apps from the app store will be copy protected, so you'll have all the same headaches as other copy-protected media from Apple. You're just trading one problem for another.
10/20/10 at 6:26pm