Lego builder Matt De Lanoy, a.k.a. Pepa Quin, has constructed many of Futurama's Earthican landmarks, complete with minifig delivery boys, robots, and aliens to witness the plastic brick horrors of the 31st century:

This layout is the culmination of a work in progress for over two years. I started with the Planet Express and major characters back in February 2008. In December 2009 I expanded the building to include the sub pen, and built up a portion of the surrounding area. In late April through June 2010, I worked overtime to build an 80"x60" layout, ready in time for Brickworld 2010 on June 17th. This layout is a part of the much larger Northern Illinois Lego Train Club, and may be seen at our various shows in the Chicago area.

See also: Pepa Quin via reddit

The whole Futurama Lego collection is on Flickr. Sweet.