Valve ( http://blogs.valvesoftware.com/abrash/valve-how-i-got-here-what-its-like-and-what-im-doing-2/ ), a game development company, may qualify as an extreme example of "Loose Hierarchies, Strong Networks", especially the networks part.

"Valve has no formal management or hierarchy at all.

Don’t mistake this for anarchy. People commit to projects and choose “leads” by informal consensus. It reminds me a bit of the Finnish education system ( http://www.forbes.com/sites/erikkain/2011/05/02/the-finland-phenomenon-inside-the-worlds-most-surprising-school-system/ ), where trust and team efforts have replaced more traditional teacher-student relationships."