So, the Nintendo DS launched today to much fanfare. Unfortunately, not everyone was able to grab one, what with the insane amount of preorders the system garnered. If you saved up your cash for a Nintendo DS, but weren't able to get one, you can now put that cash to use elsewhere. OfferCentric has just launched DS4Free.com, a site that will allow you to get a Nintendo DS system completely free. All you need to do is refer 4 friends to the site, and you will soon be enjoying the dual-screened goodness that only Nintendo can provide. Click here to sign up, and we will print your referral link in this article! If you are already signed up, remember to use Gear Live QuickTrade! to finish up!