Asus exec states Google's tablet is aimed squarely at the Kindle Fire, "Nexus" sign snapped chilling in the I/O conference building

Fair enough, and with so much leakage Google will surprise everyone if it doesn't reveal a 7" tablet with 216ppi pixel density and quad-core Tegra 3 for $199 today.
Actually an observant blogger snapped a photo of the I/O conference building third floor from the outside, and one can clearly see the slogan "Nexus" put up there for the world to see.
source: Reuters and AndroidAuthority