Comics that Might Look Good as Mosaics

I used a program to tell me exactly which pieces to buy for the Penny Arcade mosaic, but somehow I've miscounted even worse this time, and we're going on like 3 rounds of orders for missing pieces.  Long story.  Anyway, I figured maybe I should spend this time designing the next one.

I want to spread out to as any different comic strips as possible, so that if one author says no (refuses to sell me rights to use his work), I can just move on to the next person to ask.

I don't read all of these, but here is a list of comics that I either like or would enjoy having a mosaic of:

PA
Cyanide and Happiness
PHD
Questionable Content
Mac Hall ?
Dinosaur Comics -- movable type
Sinfest
Big comics like:  Garfield, Dilbert, South Park


And here are some individual ones that might make good mosaics:

http://xkcd.com/99/

http://xkcd.com/81/

http://xkcd.com/42/

http://xkcd.com/242/

http://xkcd.com/302/

http://xkcd.com/297/

http://xkcd.com/293/

http://xkcd.com/614/

http://xkcd.com/135/

http://xkcd.com/246/

http://www.xkcd.com/303/

http://xkcd.com/387/

http://xkcd.com/244/

http://xkcd.com/262/

http://xkcd.com/285/

http://xkcd.com/149/

http://www.explosm.net/comics/1405/

http://www.explosm.net/comics/1462/

http://www.sinfest.net/archive_page.php?comicID=4204