Project:Electorama! (local link: Electowiki:Electorama!) is a project led by Rob Lanphier. It was started in 2003 Rob Lanphier (RobLa) when he first registered electorama.com. He created "Electorama.com" as a shared blog in the style of Slashdot, Kuro5hin or Daily Kos, and intended as discussion site to complement the election-methods mailing list (started in 1996 by RobLa). But then the #Electorama wiki really started to take off, and for a while, "Electorama" and "Electowiki" became synonymous.
See Electorama wiki for more about the relationship between Electorama and electowiki.