Concertina Arrangement

http://www.metadesign.com/

this is not a "wow" site in the conventional sense. However there are some points to note:
1. The concertina effect is a very simple arrangement. It manages to contain a large amount of "pages" and harbour interesting side navigtation.
2. These people have seriously big clients. Their work is to demonstrate the work they do. Not so much their own web site. So again the simple concertina effect achieves that. Its not in your face or anything.
3. The shades of grey and white and orange/red are very reminiscent of Adobe. Thats because they design for Adobe!