Notes on OS X Tiger for geeks:

HFS+ aware rsync, cp & mv commands, so no more mangled resource forks... maybe.

Access Control List (ACL) support - which should be interesting to look at and compare with the acl implementations on xfs, ext3, ntfs & afs. The linux ext3 acl implementation is known to be slow due to the way that acls are stored on the filesystem. The Server page seems to indicate that NTFS acls are supported, which would be quite nice.

The Tiger Server sub pages have not been updated yet, but here are the notable features promised:

Portable Home Directories (dropped from OS X Panther) - which should be equivalent to the Windows Server offline files feature (when it works) that is used for syncing My Documents with a server. Question: Is Apple going to pass this off as a backup mechanism? Will this use rsync?

Postfix mail server with spamassassin & ClamAV (open source antivirus solution) built in. I've already configured several clients with this already using instructions widely available, but there is always the worry of an upcoming apple update screwing it all up. A built in solution should be easier to administer.

The new version of Directory Services supports "NT Domain Services". If this means domain groups are finally going to be supported, this would be a good thing. This along with the NT Migration tool should make it quite easy to migrate clients with NT 4 PDCs to OS X.

Built in Jabber server. Yay! Jabber chat throughout your organization. More importantly, iChat now supports connecting to Jabber servers.

Built in Blog server. I'm not sure which one they are using, maybe wordpress. Regardless, this is a good thing, as hosting your own blog decentralizes the whole blogger/livejournal hosting centralization mess.

Come on people, how about snapshot capabilities in OS X? I want to implement Volume Shadow Copies for backups on Macs...