(I'm stealing the format of this post from Michael May's Adventureblog... note that all art is linked to the source and artists are credited.)
Betty Cooper
by Sam Kieth (The Hero Initiative)
By Fernando Ruiz (Facebook)
Kitty Pride
By Adam Withers (Mind your P's & Q's)
Mermaids & other Sea Ladies
By Amy Fletcher (SINicallyTwisted's LiveJournal)
By Melanie Gillman (COMICS)
Tomorrow's wallpaper
Recent cover scans I added to GCD:
Archie & Friends #143
Walt Disney's Comics and Stories #706