You purchase a greendot card from the store, you activate it and within 10 days they send you a customized visa/MasterCard with your name on it. One way to add money to the card is to buy a moneypak, after you get a moneypak, you get a reload pin (like a cell phone reload pin) and you call or go online and access your account and enter the pin and it adds the money to your account. Other people can add money to your account by sending you the PIN number. So when you trade btc for moneypaks, you will have the money with minutes after getting your PIN number, unlike withdrawing to a bank that takes days. I used btcpak for a long time, and when they went down, I saw a huge business opportunity and my business partner funded the project by buying the moneypaks, and I take care of the site.

MoneypakForBitcoins.com