Fork over the $25 mill Branson.  This thermoacoutic natural gas liquification process would liquefy CO2 also..  Once it is liquid it's very easy to sequester it.

http://thefraserdomain.typepad.com/energy/2007/03/thermoacoustic_.html#comment-62503904

Great technology! Now apply it to C02 liquefication and win the $25 million dollar Branson prize. Hope it is for real.  I need the cash! 

The additional CO2 from the natural gas combustion to make the acoustic energy can be liquefied along with CO2 from a (prefferably) fuel cell power plant.

By recovering the energy from the heat with cogeneration the whole process would be very efficient also. Heat or cool building with the waste heat, for instance.

I'll split the prize with you guys 50/50 Scott! 40/60? Hehey.