Language Log was started in the summer of 2003 by Mark Liberman and Geoffrey Pullum. For nearly five years, it ran on the same elderly linux box, with the same 2003-era blogging software, sitting in a dusty corner of a group office at the Institute for Research in Cognitive Science at the University of Pennsylvania.
Other more or less regular contributors include Arnold Zwicky, Ben Zimmer, Victor Mair, Bill Poser, Heidi Harley, Roger Shuy, Geoff Nunberg, Eric Bakovic, Sally Thomason, Barbara Partee, and John McWhorter. And an additional cast of dozens have blogged here from time to time.
On April 5, 2008, the original server suffered a terminal illness, and was replaced by a new machine in an actual server room with professional support, thanks to Chris Cieri, Chad Jackson and others at the Linguistic Data Consortium. The blog posts between 7/28/2003 and 4/6/2008, in the ugly but beloved old format, can be found here.