Holy crap! Y'all, I must immediately direct you to:
The entires have been opened up so that fans can vote for their favorites while Georges Jeanty judges the works.
Seriously. GO. AMAZING. *flails* You can vote for your favorite three entries and the artist will get a Fan's Choice Award.
My favorites are #2 (the dusting effect, the skulls!, the Joss Whedon vampire!), # 7 (omg Cirque du Slay! This is beyond incredible!) and #20 (I love the coloring on this, Joss and Buffy look like they're glowing, and the concept is absolutely wonderful in its simplicity, but executed to perfection.)