I am designing a page with a few artist who will offer basic designs live online for free but what i am wondering is .. does anyone know of a way to make it so each artist can log in and make them selfs available or unavailable and it will show below a avatar on a page of theres or something to that sort? Thanks much in advance for any help!

Yes there is:

Each artist can create a Meebo account http://www.meebo.com/

Once the artist created a account then can create a Meebo Me Widgets (preferences > meebo me widgets), copy the chunk of HTML code into the the webpage of artist and when the artist logs in they can chat with visitors when the visitor comes to see the page.

~ Daniel