Homestar Runner is a web-based Flash animated cartoon series that makes use of surreal humor in reference to pop culture. The papercrafts are actually playsets that was intended to go along with the Cheat Commandos (character) figurines. The sets include a troop transport, Reynold's apartment, Cheat Commando's headquarters, and Nana's backyard. Thanks to Pascal for sending the link.
Update: I've just received another link to a papercraft model of Homestar himself, thanks to Shan for sending it in.