Here is an excellent recent essay on Gramsciism from the Mindszenty Report. It mentions influential Gramsciite Herbert Marcuse coming to New York during the 30's. I suppose he must have been at Columbia then.
It also details how cultural marxists have sidestepped economic methods of fostering revolution to focus instead on undermining our cultural and religious institutions. Purely fiscal conserservatism is useless for fighting Gramsciites. Opposing them requires genuine cultural and religious conserservatism.
Since economic Marxism was a failure, Gramsci reasoned that the only way to topple the repressive Western institutions was by, what he called, a long march through the culture.
I have read a number of articles on the subject of Cultural Marxism. The best of which is a simple speech given to college students by Bill Lind.
http://www.academia.org/lectures/lind1.html
If you want to see what Marcusism and Third-Worldism look like in an echo chamber, check out the anti-war rally held by professors at Columbia on Wednesday:
http://www.columbiaspectator.com/vnews/display.v/ART/2003/03/27/3e82ec7193097?in_archive=1