It's JUST good...no really...
It supports a lot of things natinely such as Php and such...I don't know alot about it, but it is very secure(only on Unix?linux however). IIS isn't horrible, its just really weak security wise....that is, if you don't know how to administer it...
Think of it this way....
Win2kServer or Adv Server or DATA Center..
Crying baby that needs you constant attention becasue otherwise it will get ringworm(excuse the pun) and malaria(something that rythmes with melissa) if you don't
Unix/Linux(Unix is a pain somethings because of weaknesses as well..damn daemons

)..
The hardass baby of a bikergang that won't take s..T from nobody.....and no it won't let the internet violate its policy....
addons are another story(citing the recent problem found with the infamous Squid prxy server..the newest relases fixes this problem...:cool
