After signing up, you’ll be taken to your portfolio page, where you can instantly add 6 projects (the developers will be allowing more projects as the days and weeks roll by). And you can easily drag and drop your projects/images for easy reordering. On the settings page, you can customize the look of your portfolio page, currently offering two background colors (black & white) and two typefaces. Simple, yet useful.
Take a look at some example portfolios here.