For anyone seeking to register themselves as a new AdWords API developer, you may want to know that the registration process recently changed.
Eric Koleda from the AdWords API Team said in a Google AdWords API thread:
Are you trying to register as an AdWords API developer? If so, the process has changed recently. Follow the steps on this page to register as a developer.
So if you end up on a weird page, just follow the link above and you should be on your way.
Forum discussion at Google AdWords API.
Note: This was written Sunday, April 4th and scheduled to be posted today.