592 Unique Remote Website Counters

Need an application that people can place on their site that will update a number that is larger than 1 trillion on a somewhat real time basis. It will count up. This clock will measure an ever increasing thing, say the number of trees in the world. I want the application to be easy for people to put on their site. The key here is that unless the site posting our applet on their site has a link back to ours, using the code we provide, the applet won't work. Using an admin panel on our site we need to be able to control the total number displayed by all the agent sites and the rate of incremental increase of the number to keep the displayed number as accurate as possible. I also need the same thing in another counter application that will track three different items where the individual count is less that 200,000 for each item. Same admin functions are needed to control the individual three counters and speed as part of the smalled three counter application. Rather than hammer our site to synce, the remotely hosted display applications can call back to our site once a day to synch up. Website style and colors will be given upon award. You will not have to design the page this application will be on, just the look and feel of the actual application.