Just found this on battlelog
"***9AM Update***
Beta Launch TBD – Coming Today
Players,
The Medal of Honor Warfighter beta is not yet available on Xbox Live Marketplace for download. The issue is temporary and we’re working with the Xbox team to get it out the door. We will provide an update at 11am with an update.
******************
Players,
Thanks for your patience while we work to launch the Warfighter beta! We're working with the Xbox team to release the beta via Xbox live Marketplace. We'll provide an update at 9am Pacific with our progress here. Stay tuned!
Daniel_MOHW
Senior Community Manager"