The Disney Dream Rewards Dollars will be posted to your account at the end of the billing cycle in which they were earned. Or at least that's been my experience. You will get 1% back on all purchases made with the card. If you enrolled using a bonus code and got the $50 reward, you will need to activate the card and make a purchase to get the $50 DDRD. You must use the card by 11/15/04 in order to get your bonus.
Once the DDRD appear in your account, you will need to transfer them to a rewards card to be able to use them. You need a minimum of $20 DDRD to reuest a card and transfer that amount to it. You will need at least $10 for each subsequent transfer. Transfers and reward card requests can be done online or on the phone. It takes about a week to 10 days get your rewards card. Any transfer of DDRD after that is almost immediate.