Arlo/Artists is a fantastic way to build a great-looking portfolio site. You can pick from nicely designed themes, custom domains and a truly powerful templating system for full control. Arlo/Artists lets you have unlimited portfolios and a clear interface to let you focus on organizing and promoting your work.
Considering he designed and coded the entire system himself and that they are coming out with a gallery version in the coming weeks, which is even more complex, I am convinced Dylan never sleeps. Ever.