Do people who are hard at work and trying to concentrate really want to be interrupted by a gong at random intervals? It must get really old after about the third time. I'd much prefer to get an e-mail each week with a list of new customers, or just put it on an internal web site.
this reminded me of github using traffic lights for their continious integration system.
[1] http://urbanhonking.com/ideasfordozens/2010/05/19/the_github...
[2] https://github.com/atduskgreg/GitHub-Stoplight