Playsation Network Cards

Does anyone know or have you seen these anywhere? They were supposed to come out early this year and I still haven't seen or heard anything about them. For those that don't know, they are sorta like the gift cards you can get for iTunes. You purchase a card for X amount of money and use it to purchase items/downloads over the PS network. There are a few things I wanted to get like some songs for Rock Band and an add-on for Warhawk. I don't want to use a credit card and a prepaid credit card didn't work. In fact, it ripped me off. I got a prepaid card that was supposed to work on the network. It took money off, but said it wasn't valid. Nobody would give me my money back.

Thats bad, I just use my sony card. I got one just for using on their network and got them to cap the limit to 100.

I looked that up and saw that it is a credit card. I don't want a credit card. I hate having those things. The network is ready for the PSN cards. There is a place for entering your PSN number on your account setup. I just haven't seen the actual cards anywhere. I heard they sell them at PX's on military bases, but I don't have a way to get on one anymore.