Due to magical GW copyright and whatever there aren't as many 40k comics out there as there used to be. Sadness. Anyway, when there are, it's pretty great. I think if people find anything 40k or Fantasy or whatevercomic related a general thread to post would be pretty neat?
We of course know of http://www.wobblymodelsyndrome.com/
And then there is http://www.servantsoftheimperium.com/comic.php
Which are fun 40k comics and the only two I really know of and actively follow, although http://minicrit.com/ does some 40k comics every so often.
Like this one: http://minicrit.com/comics/2012-08-0...t-Smelldar.jpg
Fun times for all.