Good design portals

Hi all. I told my professor that I would come up with a bunch of good links for my design class this week. We are going to be putting a website together for the design students for reference. So far I've found a few including:

http://www.AllGraphicDesign.com
http://www.linkdup.com
http://www.creativityportal.com
http://www.mccannas.com/pshop/menu.htm

Any others you guys use?

Thanks...I appreciate the help. :-)