Based on screenshots seen from Jeff's screen, the number of flags is indicated beside the "mod" link for diamond moderators
I think it's a good idea that 10k users see the number of spam/offensive flags (like the one shown on the "flags" tab in the
/tools) near the "tools" link at the top of the page. It will result in faster elimination of spam posts.
By the way, I think it's more useful to show the number of flagged posts rather than total flag count. Even better: subtract the ones that you have already voted on.
P.S. Where's the new mod to work hard removing spam in quiet hours?