Make 395
Phil @ MAKE says:

This is going to be funny, Mark Frauenfelder our editor-in-chief @ MAKE will be on the Colbert report. Rumor has it that Mr. Colbert wants to know why MAKE hates corporate America so much that we’d teach people how to make their own things instead of buying them from the corporations that make our country great.

Comedy Central: Shows – The Colbert Report – Link.

The Colbert Report airs nightly at 11:30 p.m./10:30 Central, then again 3 or 4 times the following day. So Mark should appear on:
Tuesday — 11:30 p.m.
Wednesday — 1:30 a.m., 10:30 a.m., 2:30 p.m. & 8:30 p.m.

Update: Here’s a guest alert – Link.