Last week, we reported that Google’s first tablet Nexus 7 might be revealed at Google I/O this week. We were right, Google has released its long-awaited Nexus 7 tablet at the conference. Pre-order of the device is now open at Google Play store. The tablet will be available in two versions – 8GB and 16 GB. The 8GB and 16GB Nexus 7 is available at Google Play store for $199 and $249, respectively. And, Google gives a special offer with early pre-orders – $25 credit to spend in the Play store as well as some great free content. Nexus 7 will support more than 600,000 apps and games, millions of eBooks and songs, thousands of movies, and a growing selection of TV shows and magazines on Google Play.