There is a new miniature doing the rounds that is part of the 7th Edition release in some way.
Here is the picture doing the rounds pretty much everywhere:
This has been described to BoLS as a limited release bundle miniature, that will be made available as part of purchase bundles with 7th Edition. I would assume Games Workshop will offer similar pricing and production limitations to what we saw with the two website-launch Space Marine exclusives.
There is also word of a 2nd follow 7th Edition linked exclusive miniature (an Ork was mentioned)