http://emek.net/index.php This is Emmek's portfolio/online shop. He has work that just blows me away from the motion graphics to the illustration. Easy to navigate... and you should its worth it.
http://thetoke.com/ Before you click on the link, I just want to say this is a perfect example of an AWESOME portfolio, that takes too long to load. If it wasnt for class I would have closed it after 20 seconds.
http://alexarts.ru/en/index.html interesting layout from russia :) I thought the nicest touch was how the layout stays the same but the content comes up over the splash page. Im not sure if you can really call it a pop up but thats basically what it does.
http://www.mikesamazingcakes.com/ This site has some nice gallery effects, it's technically not a portfolio site for graphic design but I think its worth a look. It might inspire your digital portfolio.
Mariacolomy.com I like the transparency and motion in the design of her portfolio. There are some nice logos as well. The background image was a bit risky, but I dont believe it fights for too much attention after you start clicking.