It looks like some details leaked on the first Google/ASUS Nexus Tablet.
Most of the details were already guessed prior to this however it looks like this may be the first screenshot.
7 inch screen
1 GB RAM
Quad Core Tegra 3
8 or 16 GB of Storage
Double the screen density of the Kindle Fire
Android 4.1 Jelly Bean
One thing the link ads that I have not seen before is NFC on the tablet, I assume it will mainly be used for NFC tags or Android BEAM. There could be a possibility that Google Wallet may also work on the tablet.
It looks like Google is aiming this directly at the Kindle Fire.