Ask A Korean has a posting up of North Korean jokes translated from the webpage of a North Korean defector.  Here is a sample:

A:   There is a new power plant in Hamheung-si.
B:   No, I’m just coming back from there, but I didn’t see a power plant.

A:   And there is a new chemical factory in Kimjeongsuk-gun.

B:   I was there a week ago but I didn’t see any factory…

A:   Comrade! Stop running around and read the newspaper once in a while.  [Ask A Korean]

You can read more North Korean humor at the link.