After a while your office may start getting on your case, and you will be torn between shutting down the project (making you a failure), turning down the sound (which makes it less useful, unless you have a spare corner nobody usually goes to), and turning up the sound (to show off your great jungle sounds (like Peep) or whatever you are using. Sound clutters up a space. So you might like to have some other tricks up your sleeve, for example Xerox PARC and also the MIT Media Lab has thought of some interesting things. For example here is dangling string. You could have propellors, christmas lights, or other things more suble than a beep for every hit. And also, you will want to consider what happens if you get clobbered by a lot of people. Maybe you have a soft click for each hit, which will not be so annoying even if you get posted to slashdot, but you also produce a full tone at a pitch suitable to express a certain magnitude of accesses per minute. Also consider how much load and blocking this is going to put on the systems and the network.