Do it! Report the results.
But I still have all my MobileMe services available on iCloud. My mail, my contacts and everything else are still there. All except idisk which I didn't used anyway and they've warned a year before closing it down. They also offer me free 25GB instead of 5GB of standard iCloud because of my old MobileMe account.
I've forgot to add this funny piece of information:
SuSE Linux Enterprise SP2 doesn't support ext4. It will mount ext4 volumes as read only in order to facilitate migration from ext4 to supported file systems including BTRFS.
https://www.suse.com/releasenotes/x86_64/SUSE-SLES/11-SP2/#fate-306585
I think there is the possibility that they might be planning to replace NSS on Open Enterprise Server with BTRFS.
X over SSH is a real pain to use over internet. Not that I'm recommending Splashtop.
Have you checked freenx?
I know that a lot of people working on NASA doesn't use Windows.
And then there is this talk again about people replacing email with something.
You don't need to actually use Facebook. Just connect Pidgim, Adium or wathever client you use to the service. You can even use OTR if you are paranoid.
As far as I can tell the policies that can be set through the GPMC console are equal or better than those on a Windows 2003 server so I think you should give a good look at it. All those more cheesy policies I've checked like desktop settings and restrictions, package installation and more are there.
I don't know if you can edit the password settings through the "Domain Security" MMC but I'm not saying you can't either. The "samba-tool" command however allows you to set password policies.
Again, go look at it. Even if you are not planning to use it because its an interesting experience. I'm not saying that OP should use it because its still in release candidate stage but it will become a great piece of software when they release a stable version.
But there is GPO support on SAMBA4. You can even manage them remotely through GPMC on a Windows computer.
SAMBA4 implements GPO and so a lot of other systems that are not "AD" like Zenworks.
It works like a charm and it helps a lot on pure Novell environments that need Active Directory because of a certain software or operating system. With Novell-CIFS it even respects the trustee control lists.
"Or can Samba4 do Group Policy?"
It does.
And then there is the PAC on Kerberos. I've read that the Samba team decided to implement their own internal LDAP and Kerberos systems because it would require so many modifications and patches on existing and stable projects that no open source project would want to maintain just because of Samba.
Hackers of the world, unite!