Some interesting sites:
Mona Lisa On The Web Galleries, resources, and links to hundreds of versions of Da Vinci's Mona Lisa. Some of the links to versions I particularly liked were:
Harold McGee, author of the fabulous food-tech resource On Food and Cooking has a blog, The Curious Cook. Postings aren't that frequent (about once or twice a month), but they're always interesting.
Jason Hill Design Hill is a local artist/designer whose work has been labeled as "Retro-Futuristic", with influences from Pop Art, 1930's travel posters, and The Jetsons. Groovy, man. He's best known for his series of paintings of architectural landmarks; his depiction of the Phoenix Financial Center (aka "The Punch-Card Building") has been gaining ground as a well-known icon for the city of Phoenix.
The Arizona Opera has some particular striking publicity art for its 2006-2007 season. (The link goes to a page showing the art for all five shows; clicking on a particular piece will take you to a page with a larger version.) I particularly like the art for MacBeth and Madama Butterfly; either would not be at all out of place if they appeared in the annual Spectrum best-of-year compendium of sf/fantasy art.