I don't usually break the format of Covered, but I thought I would make an exception to mention some other sites that are similar to Covered that you might enjoy:
Repaneled: This is frequent Covered collaborator Anthony Vukojevich's blog that does to comic panels that Covered does to covers.
Cornered does this same idea, but this time with those corner boxes that have the star(s) of the comic in them.
Rejected by Covered: Have you sent a cover to this blog only to have it rejected? This is the blog for you. Josh Blair and JB Sapienza are posting anything that has not quite made it on Covered, so if you have have had that sting of rejection, send your cover here and have it find new life.
Do you have any favorites that I didn't mention? Go ahead and post them in the comments section.