Get ready for two crazy hours of Google awesomeness: I/O's opening keynote is about to begin. This is typically the time for the company to unveil some of its biggest projects and set the tone for the following year. Just two years ago, for instance, co-founder Sergey Brin skydived onto the roof of the venue and biked into the keynote while wearing Google Glass. Whether we'll see anything as adventurous this year remains to be seen, but that's why we liveblog these things -- so you, dear reader, can experience every second of the madness right along with us. So join us right back here at noon (EDT), okay?