As jonstewart said, the standup is for communication. In my team the morning standup will occasionally take less than a minute, a much shorter interruption than getting up for a cup of coffee. It makes me aware of what everybody else is working on and their progress, which I think is valuable.

If it acquires a have you done any work at all? vibe, you just fight it off with honesty. A half-hour standup is just insane. A large 'scrum of scrums' standup with dozens of people/teams shouldn't take longer than 15 minutes.