You'll need to supply a valid email address that you can check for the confirmation email - that's all you really need. No credit card or tweeter accounts, no sir.
You'll get a confirmation email for your AudioPropellor site and also one for our mailing list. Feel free to trash that one if email isn't your way of keeping up with things - no hard feelings.
Be sure to enter a password at least 6 characters long and no spaces in it. If you can't read the funky image at the bottom, don't be afraid to hit the refresh button to get a new image. They can be tricky!