I've been compiling various art related to A* in a thread on the Newgrounds forum for a while now:

A* art thread

Got some high-res remixes, concept art, layout doodles, etc in there.

I've also just added my entry, plus some variants (page back once to see the original entry version w/ titles and stuff) for poxpower's "Ng Miniposters Girl" contest. There are some cool entries in there, give it a look!