Last week they were still working on illegally hacking Microsoft's authentication protocol for the new XBOX One controllers. Don't expect much of anything to be available, and when it does come available, check to see if it's an illegal product (purchasing an illegal product puts your XBOX Live account or even your console at risk of suffering a ban).
PS4 on the other hand has their console opened up for third-party accessories so you should expect quite a few devices to be available and little to no risk of any issues connecting pretty much any accessory to your PS4.
Don't forget to purchase the additional gear you'll need for full compatibility (wireless dongles, extra wired controller, etc.)
I'd love to go black market, but I enjoy living in the USA.