Interesting question. I had briefly pondered making a comic for the trilogy - Conan the Barbarian, Conan the Destroyer, and Red Sonja. However, I soon realized that, were I to make a comic of the other two, I would spend months upon months watching those movies.
Just imagine the horror!
I had thought about doing a comic on Krull (not Kull, which would, however, be another Howard-based film). Unfortunately, I think this one comic has worn me out. I think I'll move for a bit onto a blog about video game and movie reviews; in particular, focusing on small, low budget stuff. I have some Barbie video games and films I could go with, and I already made a few attempts at it earlier:
http://groboclown.blogspot.com/2006/12/arts-review-dada-dora.html[urlhttp://groboclown.blogspot.com/2006/12/movie-note-barnyard.html[/url]
As for other screen capture based comics, the ones I know in this sub-genre are:
DM of the Ring - the one that started them all
http://www.shamusyoung.com/twentysidedtale/?cat=14 Darths & Droids - which you already mentioned
http://darthsanddroids.net Sideways Spa - it seems to have gone quiet lately
http://sidewaysspa.lucidfox.org/strips/archive