I know this is not quite related to the free source offer, but just as an example of how I have seen these offers managed by Sun in the past.

About five months back they offered free copies of Solaris for personal use. All you had to do was order on the web site and pay delivery. Five months later (just yesterday infact) I got sick of waiting for it to be delivered, cancelled the order and demanded a refund. Lets hope this will be better managed.