The Museum Of Online Museums is portal to many web sites that are themselves museum or gallery web sites for collections of (sniff-sniff) old stuff. Often the main sites are quite well known. What is special is that MOOM takes you to a page on that site that you might not have yet considered visiting. For example the link for the New York Metropolitan Museum of Art goes to their fascinating Timeline of Art History. As you double-click around the site you end up in more out-of-the-way locations. A fun place to look around is in the Annex.
Somehow in all of this, as you click back and forth between MOOM and other sites you begin to understand that you are wandering in a space or frame of reference that could occur only on the Internet.
After a while, you may step back a bit and ask yourself "Where am I actually?" It turns out that MOOM is "edited by Coudal Partners, a design, advertising and interactive studio in Chicago, as an ongoing experiment in web publishing, design and commerce".
As you begin exploring the other pages Coudal site, you will come across much more stuff that as a totality becomes web-art. For example Layer Tennis is a delightful mash up of graphic
As we so often see, the web-art parts are portrayed as portfolio demos or presentations of skill sets. But deep down you can can hear, coming out from the web pages you are visiting, that primal scream: "I am an artist".