At the Arisia Science Fiction Convention last weekend, I moderated a panel with SF Writer Lawrence Watt-Evans and comics fan Israel Peskowitz. We spent 45 minutes reeling off a list of the webcomics that we love, past and present. In no particular order (ok, in alphabetical order...), here's the list we came up with, along with the status of the comic when known. Remember, even when a comic is no longer active, it may have a huge archive worth perusing.
Caution: Some of these webcomics may be Not Safe For Work