Google just sent out the above cryptic invite for a media event in New York on October 29. All it reads is "The playgroud is open," which is the same slogan it used when promoting the Nexus 7. What could it have in store this time? More Nexus tablets? New Nexus phones from LG and Sony? A new version of Android? Updates to the Google Play store? We'll find out at the end of the month. Let us know your guesses and stay tuned as we learn more.