[teh_klev]

Licensed under a slightly modified "Q Public License":

http://www.observium.org/wiki/Developing_for_Observium#Licen...

http://opensource.org/licenses/QPL-1.0

So not totally sucky, it's still open source and free beer.

[jlgaddis]

You can't redistribute it (even though they include GPLv2'd code with it).

That's not exactly free.