This is what I love about free enterprise.
Pop!Tech and EBay just launched a new initiative. You can now go to an online store (here), estimate your carbon footprint and buy credits to offset it. You can choose how much of your footprint to offset. Credits that you buy get distributed between 3 Green projects currently underway in various corners of the world.
Pop!Tech just made it to the (extremely short) list of conferences I want to attend.