This is the “6886-1 Galactic Peace Keeper” from the Space Police 1 Lego sub-theme.
I did this last night while watching Comedy Central’s marathon of Jeff Dunham specials, as part of a call for build suggestions. It was a fun little exercise, taking about three hours to complete, and with very little complications.
For more images of the 6886-1 Galactic Peace Keeper, as well as the MLCAD file containing the block set, follow this link: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=543422
Built in MLCAD / Rendered in LDView.