Can you believe another year has passed? Are you ready for it? It's Google I/O 2013 time, and we'll be sharing all the details and announcements all week long. Today is technically day 0, and Google will be taking the stage tomorrow morning at 9:00 AM PDT for their first and only keynote this year. This is where we'll be learning all the news and putting rumors to rest. In the meantime check out our on-site preview, through Glass.