Hey dudes, just thought I'd throw this out there as this is how I'm going to buy the DLC's and really how I buy everything online w/ out having to worry about my credit card information being stolen. Visa gift cards! Just put some money on that bad boy and presto! you can use it like a credit card. Just make sure you give it enough time to be activated. ps Don't bother posting on here how it's a waste of money, this info is for anyone who wants to buy it... all you negative nancys can take your snide comments and blow it out your a**, I won't be responding to them.

I also don't own a credit card, but I am going to buy the dlc. There's something similar to the thing you mentioned, but from mastercard. You buy a card with a certain amount of money and you can use this money just like a normal credit card. But you have to throw it away after the money is used up, afaik.
It has a bad taste because (afaik) the minimum amount of money is 150 € you have to invest. A bit hard if you just want to buy it for the 10€-dlc....but until the SDK is released, there will be several dlc's I think....

Apparently you can't do it with the virtual cards from what I've heard, it has to be a physical prepay card. Just search online for prepaid credit cards, also if in UK you can get one from places like cash generator, also virgin and cashplus do them but you have to send off. Usually ￡10 minimum top up on them.

Or they just make Paypal finally an option. Like 99% of the online-stores out there.