When you walk into the offices, two words come to mind: fluid and personal. Noah Sussman, the company's architect for quality assurance, greets me at the door with a huge "over here" grin and a wave, and immediately starts talking about the office environment, perhaps the most open I have ever seen.

The technical team has its desks strewn about in rough rectangles to create "hallways" to the walls. The team needs those hallways, as it grows to fill an office that appears to be, at first, one huge room, with a few side offices used as conference rooms. (The conference rooms have nicknames, like "Kung Foo Fighters" and "Slim Jim Morrison" My favorite was the spaceship room, "Pjörk," which included art designed to create a "mustache mural.")

Another word that comes to mind is playful.