Online portfolios are a really hard thing to create.  I'm always thinking of the next revision of mine and looking for good examples to take inspiration from.  I came across this gorgeous one today.  It's called Glashaus (Glasshouse) and it's the online portfolio of German graphic designer/illustrator Peter Hoffmann.  It's elegant and minimal, allowing the work to be the main focus.  Peter has some excellent content as well, including packaging design, logos, sketches and illustrations.