Media Express Buffering System?

I have emailed Blackmagic wondering if there was any way to have a buffering system using the Intensity Series. They said that their was not, but if it was possible, it would be through their SDK or another 3rd Party Application.

The service representative then told me to ask on CreativeCow! So that is why I am here. Does anybody know of any system where buffering would be possible? This means that I wouldn't have to constantly record everything I am doing, but rather, I could just go back in time after I do something, and then just record a section of what I wanted.

Thank you for anybody that has any ideas.

-TitanVex