Here's a big treat for you genre fans: art site The Theban Band (note: front page a little racy and potentially NSFW) features several series of gay slash art, mostly focused on sci-fi and fantasy stories. Above you see Torchwood's Captain Jack and Ianto Jones, and on the Band's website you can find similar work based on characters from Smallville, Doctor Who, Angel, The X-Files, Harry Potter, and more. The site also features work rooted in both historical and original mythologies.
Check it out — some of the work is really striking. (Thanks to Dwiz for the tip!)