Updates on Exxon Mobil CFZ Cryogenic CO2 Separation Process?

[altenergygeek]

I heard about a cryogenic process (CFZ) for separation of CO2 a few months back; this effort was being pioneered by ExxonMobil (you can find [URL="http://powerplantccs.com/blog/2010/03/cfz-cryogenic-co2-separation-process-from-exxonmobil-to-be-demonstrated.html"]some more info on the CFZ cryogenic process from here[/URL] ).

While at first sight it looks like an effective idea, I wonder how much it could cost given that it could take a considerable amount of energy to cryogenically cool the CO2. And how well the costs will compare to other separation / capture mechanisms such as the amine based capture mechanisms.

Any thoughts?