A lot has been happening lately, as far as collections of images are concerned. Conceptart.org just launched a huge initiative to fight the Orphan Works Bill here.
And Google recently received acces to the legendary LIFE photo collection. Whoah!
I guess while I'm on the subject probably the greatest collection of classical illustration outside of the library is Leif Peng's. Daily visit for me.
I put all my online discoveries at the links at the bottom of this blog. They're consistently updated so check back every once in a while for some fun stuff.