Awesome list, but missing a few absolute gems.
Inktank, although his (now finished) webcomic Angst Technologies is his best work, found in his archives.
usr/bin/w00t, also known as w00t-comic. Also finished, but awesome.
Reasonably Clever, also known as The Brick House. Still running, still all-lego cast.
Basic Instructions, still running.
anti-HEROES, based on the OOTS style, still running.