I recommend redbubble.com to anyone who hasn’t looked at it before. It’s a fun portfolio site where you can upload many different mediums of art from drawings to t-shirts and they have fun contests. It also has the unique option to sell your work, where they will print off the image you uploaded- so you need to make sure your work is high enough resolution. You can choose your % mark up for each work, though I’m not sure it’s the most popular place to sell art- it’s still a cool option. I have actually had my own portfolio on redbubble for a while now- though it’s not exactly up-to-date. Below is a photoshop image that I made for a photoshop cs5 contest. I didn’t win and I’ve never sold anything, but it’s still a fun site. Check it out.