Perhaps an updated box that shows Geekzone:
at any one time.
How many have visited the site is less interesting as many may only be one-time visitors. Many other sites have this kind of information so it is hopefully easy to obtain and show. It could even show how many are viewing each particular forum. Edit: To clarify I mean those viewing a Forum right now - it already shows those who have viewed in the past.
Would others find this information useful?