LG's Thrill 4G rumored launch pushed back to August 21st?

Good old Radio Shack just can't seem to keep its hands on internal memos. A little over a week ago, we were treated to a pair of leaked documents, slating an August 7th rollout for the LG Thrill 4G, and now another official looking missive has surfaced, pushing the release date back to August 21st. As per the document, customers will still be able to reserve their own 3D-enabled handset with the purchase of a $50 gift certificate before August 15th. Of course, we could still see this thrilling 4G phone pop up ahead of that date, perhaps from AT&T, but if you've already got a $50 gift certificate in hand, it looks like it's time for another round of the waiting game.