Best Resources for VGX

I'm looking into VGX, but am having trouble identifying a good information resource. VMware, nVidia, etc. all have their marketing information, but where is a good place to get 'real' information about performance, etc.? Vendors?

If you're reading this post, I'm assuming you have used or have interest in VGX - how has your experience been? What good resources have you found?

Thanks,

Mike