Quest have been filling a niche for a long time now, giving us the ability to extend ConfigMgr (SMS) to non-windows based platforms.
I landed on their agent-less extensions page earlier and thought I'd blog it because it surprised me how much OS support they have
http://management-extensions.org/configagentless.jspa
There is also an agen extensions page
http://management-extensions.org/configagentbased.jspa
Tons of info on that site to help an admin evaluation and implement these extensions.
Read the complete post at http://wmug.co.uk/blogs/r0b/archive/2009/12/31/quest-non-windows-agent-extensions.aspx