[CentOS] Why CentOS as a webhosting platform

Hi,

CentOS seems to be doing really well in the hosting business these days, and 
even for people who would normally have used Windows or OSX on the hosting 
previously, are now looking at using CentOS. And I thought it would be nice to 
have a section on the wiki about exactly why that is.

Not having any direct connection with the hosting business I was wondering if 
people here could help me out a bit and let me know why they think CentOS is 
good / bad as a platform in this market segment.

I suppose that would include dedicated hosting, VPS hosting, Shared / Virtual 
hosting, and even high performance grid hosting that a few people seem to be 
offering these days.

Once we have some material here in this thread, everything will go online at the 
wiki ( with due credit to all contributors ).

-- 
Karanbir Singh : http://www.karan.org/ : 2522219 at icq