I just signed up for my ADC about a month ago. After I faxed the info it took about 2 days to become a member. The process was simple, do the following:
After you purchase an ADC Student Membership and receive an Activation Code via email, you must verify your student status before ADC will activate your product. The verification steps are:
Visit the ADC Member Site to confirm that you are a student in your ADC Profile. After you click the Student Status checkbox, you must also provide your student ID number and school name.
Proceed to the Activations area in the ADC Member Site and use the Code you received via email to start the Activation process.
EDIT : I faxed my license and a printout of my upcoming classes.
Fax a copy of your passport or other official identification (such as a driver’s license or student identification) along with a current or upcoming course schedule or other official proof of enrollment from your college/university.
North America: 1-408-974-7683
Europe: 44 (0) 131-458-6988
Australia: 61 2-8223-9347
Hong Kong: 800-908-212
Japan: 81-3-3570-8075
Singapore: 1-800-2775-3248
Simple and fast, but for now I just bought a refurb macbook. Going to save up for a 17" Macpro and purchase before my year is up(hopefully they will include a new cpu).
EDIT : My fax included my license and a printout of my upcoming classes.