The book will “build off of the events of Crosscurrent,” he annouced on his Livejournal this morning. It’s too soon for details, but we don’t know all that much about Crosscurrent yet anyway: It won’t be out until January. I’d hazard to guess that we won’t see this second book until 2011 or so.
UPDATE 9/29: Sue Rostoni has confirmed that the book is on the schedule for June 2011, pushing the Reaves/Bohnhoff holostar novel up to March.