The Halo: Reach developer has said it's working to resolve slow matchmaking times and inaccessible playlists.
After all the hype, especially Microsoft coming out saying that the Reach beta will be the biggest test in entertainment history, the Halo: Reach beta is broken.
A quick Bungie update reads:
“Yup, the backend servers are getting hammered.
“We're aware and working to resolve slow matchmaking times and inaccessible playlists. As soon as we're back up and running at full capacity, we'll make some noise. Stay tuned for more information and thanks for your patience.”
Sit tight people. It's like you can complain about a beta not working, that's what it's there for.