Local CA on Gentoo

Hi peeps,

I would like to know if someone successfully implemented a Local CA to sign services and servers using
Gentoo or other Linux.

I'm currently in a Mixed Environment (we have: Windows 2008R2, OS X Lion, Linux and FreeBSD), and I really
want a single solution, since I need certs for my servers, as example: a Postfix Mail Gateway, a W2k8 Domain
Controller, Exchange Server, Mac OS X Time Machine Server, etc.

Thanks in advance,
Vinícius