Lessig is not a perfect libertarian but is for reform at least. I suspect many of Colbert's mainstream-ish arguments in defense of copyright are partly mocking the standard Republicanoid view on IP. See also the funny video The Colbert Report ::: Remix feat Lawrence Lessig (Eclectic Method Mix)--a "remix" made in "violation" of Colbert's tongue-in-cheek warning not to (i.e., his invitation).