If you want to try out Windows Azure, or .NET Services, or SQL Services, you need an access code. How do you get one? By signing up here.
"Yes, I did that, but I didn't get a code, yet!"
We're onboarding new accounts slowly but steadily so that we do a controlled scale ramp-up. PDC attendees (having signed up with the same LiveID that they used to register for PDC) will be getting their access codes first, everyone else will be getting their access codes after that. We're a bit conservative with the onboarding waves and closely monitor the overall utilization once we allow a new wave in. So if you attended PDC and don't have a code it may still take a few days for us to give you one depending on when you signed up. If you didn't attend PDC we're going to try giving you codes as excess capacity permits.