Hey there partners!
There is this great website that is a wonderful resource for images of art! Any kinds, from any time period, from anywhere in the world! It's also free, you just need to create a log-in using your WUSTL email account.
The website: www.artstor.org
The website its self is not completely as cool as the selby blog that Elisabeth posted, but it has some really nice images of artists' work. They also are usually high quality so you can use them in power points and they wont be pixelated.
Also check out these two print shops in Chicago: www.thelittlefriendsofprintmaking.com
AND also these two printmakers (Nick and Nadine) make really unique silkscreen posters (band posters)(yay!): www.sonnenzimmer.com