Obviously, there are still some surprises they are preparing for those lucky enough to take part in next year's event, but here's what the official Google Mac Blog says:
"At any given time, there will be plenty of Googlers at our booth available to answer questions about any Google software made for Mac or iPhone. Demo stations will be placed throughout the booth so that attendees can try out Google software on their own, and in many cases, talk to the people who helped create that software.
Additionally, there will be larger presentations in the booth each day covering specific topics in more depth. Our goal is to make these presentations as interactive as possible, so we are hoping for feedback from Macworld attendees in the booth on the topics they'd like to see discussed."
These being said, I will add that the Google countdown to MacWorld Expo clock is ticking, as there are only 7 days remaining until the opening day. Just one more time - if you can be there, don't hesitate and DO IT - go, check all the interesting things around, and maybe even come back here and drop some comments! :)