Landcare Australia today launched their CarbonSmart website allowing Australians to purchase Carbon Offsets directly from Landcare:

I was involved in the development of the calculator that is used to determine your CO2 emissions.  It utilises a number of Web 2.0 technologies, mainly AJAX using prototype.  Glenn McGrath (aussie cricket legend) was involved in promoting the project and was on National Nine News last night.  Check it out and get involved by purchasing offsets!