Carbon Neutral

Real buzz words at the moment. Carbon Neutral. Sites are popping up everywhere e.g. http://www.carbonneutral.com/ Yet how many of us come even close to achieving it?
At blade we've made a determined effort to be enviromentaly friendly, we recycle wherever possible etc... However recently it was brought to my attention just how carbon neutral we are at blade.
We've just released a product "Blade Transfer Services" http://www.blade.net.nz/BladeTransferServices.aspx that allows reliable uploads of large volumes of data. Currently this is being achieved by many companies by sending a DVD of data. I'm sure there are some statistics in here about how much 'carbon' we are saving, and if anyone has a formula I'd be happy to work it out. But let's look at it now. The DVD is made of plastic, it probably won't be re-used. There has to be some consumption of gasoline to get it to the location. Notwithstanding all of this there's a delay in productivity, it's far quicker to transfer over the wire. Is this an example of a win/win situation? One where by not only do we get performance benefits but we're also helping the environment!
There must be lots of these examples out there...
Comments welcome :)

Peter