If you are a Harry Potter fan or a Star Wars fan, you have to see Leela Starsky's artwork. She also has a LiveJournal, leelastarsky .
She's a Weasley fan, and a Han/Leia fan. Her work is so amazing... If JKR announced that they'd be publishing a Harry Potter artbook filled with Leela's paintings (like Robin Wood's "People of Pern"), I would pay real money for a copy. I want framed prints of so much of her work. She's beyond "fanart." This is ART.
Oh, and her writing's not bad, either.