Now that the buddy keys are out, you may want to create an account and "poke" around on it like I have.
Once you send out the invite and enter all the information and stuff... you will find that you need a credit card to even create the account. Problem? Not really.
The credit card will not be charged with anything and can be deleted right after you make the account.
Dont have a credit card? Also no problem.
Graham King » Credit card numbers
Use that (no its not illegal because the cards are invalid anyways) and just enter any random numbers for the SVN (or whatever you call it) number. Once you click accept, it will tell you how many you need. For example, I use one of the master card ones and it said i need 3 numbers... so i put "911".
Also, for the expiry date, just put any future date in. Such as 06/09 (The year and month i graduate =P)
Create the account, delete the payment option, and have fun =P