Office-wise, I sit on the non-kitchen side of the 7th floor in SF, at desk 7010. (When I'm in MTV, I usually sit just off the kitchen on the away-from-Evelyn-Avenue side of the second floor.)
Since becoming a manager, I am hardly ever at my desk anymore; email and IRC are far more effective. I keep my calendar up-to-date; a calendar invite is by far the best way to book some of my time.
When I'm in the US/Pacific time zone, I try to keep the 8-9am and 9-10am time slots available for meetings with Europeans, and 3-4pm and 4-5pm open for Australians and Kiwis.
More information will appear here as I have time to update.