I wish to split my WordPress theme (I am working from The Buffet Framework) into 2 posts, just like a magazine or newspaper. The word "2-column" usually describes a sidebar, but I wish to get 2 posts of posts additionally right sidebar. I am presuming case rather simple of some fundamental HTML or CSS column creating, but I am unsure how to pull off it. Thanks ahead of time for the help.

I believe you are speaking about multi-column layout in CSS3 which isn't broadly supported yet:

http://www.css3.info/preview/multi-column-layout/

If you would like wider support, try jQuery to get this done:

http://welcome.totheinter.net/2008/07/22/multi-column-layout-with-css-and-jquery/

note: it crashes occassionally (particularly with images)