It is coming and probably very soon... There is an usual amount of activity related to optimizing apps for tablets and devices. Also Tim Bray from Google has also announced Euro Android Developer Labs today (september 21st) starting next week in first in Berlin (september 28,29) which will be followed by London and Paris. Thats way fast and so short notice.
Tim Bray will also be on stage for the keynote on the second day of Devoxx 2011. Although Google's contribution to Devoxx has increased since their decision of retrieving from JavaOne, being on stage at the keynote with droids all around might be for something big!
Ladies and Gentlemen please meet the Ice Cream Sandwich... soon, may be even sooner than iPhone5.