That's all the time it takes to become a registered member of the National Marrow Donor Program. The registration fee has been waived through the end of the month and all you'll need to do for now is send a cheek swab kit back to the foundation through the mail.
Take some time and read about the risks, costs, obligation, etc. I thought about it all week and decided to go for it. You could be a perfect match for someone and might save their life with very minimal risk to your own.
Make sure you register by 9/30 if you're interested - the standard $100 fee for the kit will return on 10/1.
Thanks for the link, Ashley!