I’ve just become aware of several issues with this site, as well as the MMO Comic Index going down. Both are being worked on. The information is still up, however a database error is preventing any further account log ins to work properly.
As for jkcomics.com, the Art page and SG page tabs have been removed. Art used a photobucket solution for displaying some of the custom art of the comics, but they have both changed to a pay only method, as well as removed this display feature. The art page will return once a replace display method has been selected. The SG page linked to a guildportal site, however guildportal was shut down some time ago.
More updates should be soon to follow.