Infinity Ward said they'd take care of everyone after the server crash fiasco yesterday. Today, they lived up to that promise. Everyone who signed up during the 24 hour beta yesterday will receive a beta token.
Taken from IW developer, Fourzerotwo's blog:
"I told you that we'd take care of the community, and I'm happy to say we were able to live up to that promise. Everyone who signed up for a chance at the beta via the 24-hour Beta Sign-up, WILL be getting a token!"