FYI from the Xbox.com Forums:
“Halo 3 / Crackdown : UPDATE!
Posted by SketchFactor at 5/16/2007 5:22 AM PDTFrankie writes:
UPDATE : 5/16/07 3:55 PM
We’re happy to finally announce that the issues being faced with the Halo 3 beta and Crackdown will be resolved shortly. The Microsoft team has found a solution and it’s undergoing final testing now. Assuming the test pass goes according to plan, the fix will come in the form of a Crackdown title update within the next three to six hours.
We understand many of you were eagerly awaiting your chance to jump into the Halo 3 Beta and this technical issue has put a damper on your plans. Thankfully the fix is incoming and we’re sincerely sorry for any inconvenience this has caused. Ultimately we hope this will all soon be a distant memory once you pick up the Spartan Laser, launch yourself from a Mancannon and enjoy online shenanigans with your friends.
As a reminder, people who already have the Halo 3 Beta are unaffected by this issue.
We’ll keep you posted as soon as we have more information.”
So, looks like I may get to play tomorrow.