I know this has been hashed out pretty thoroughly. Let me try to sum up, as well as put in my own 2 cents.
No one wants to import the entire Marxism encyclopedia at once.
Some people say, import a trickle. How frequently is an open question: 3 per hour? 2 per day?
Some advocates of importing say, prepend the phrase 'Marxist view of' to the title of each imported article. This would sidestep the NPOV issue -- maybe.
Jimbo points out that the biographies seem pretty good; it's mainly the concept articles that have a pro-Marxist slant.
My primary suggestion is: if anyone sees an article they like at marxism.org which doesn't have a name conflict with an existing wikipedia article, then just copy it. Assuming marxism.org is willing to let us do this.
Ed Poor