Okay guys, I have some good news. It might've been mentioned in this thread already, but for all you GoPhone users who are so impatient about teh update you guys might blow, here's how you get Denim.
Download an app called Preview for Developers in the Store. Go online to the Preview for Developers website and make a Dev account. Once you've done that, log in with that account to the app. Agree to get these fast updates and then go check for updates on your Lumia. Two updates should install. After they install, go to extras+info and you should see that your device has updated to Lumia Denim.
"Excuse me, but it still says I'm on Lumia Cyan!" you might cry. Again, easy fix. Simply go back into the Preview for Developers app and uncheck the box. Reload extras+infp and it should now say that your device is on Denim. I have no idea why it does this, but maybe it's linked to your Dev stuff or something.
No debranding, nothing complicated here. 100% working. Hope I helped! [SUB][/SUB]