I worked at hi5 full-time (More than a year)
Easy to share ideas, great to see work online, friendly atmosphere, good people, great ceo
Limited promotions, sometimes overzealous projects
The process took 3 weeks. I interviewed at hi5 (San Francisco, CA) in May 2008.
I was contacted over email (through LinkedIn) by an internal recruiter, who was very organized and clear through the entire process. We started with a phone screen for about an hour. Then I had a phone interview with the hiring manager, followed by an in person interview with the hiring manager and one of the hiring manager's peers (a third planned interviewer was out of the office).
The people seemed bright and interesting to talk with. The office was an open plan style with everyone in cubes. It seemed informal, but hard working.