How to Share an Address Book On 10.6 Snow Leopard Server.
How to create a global address book on a Mac OS X server (10.6 or later).
Mac OS X 10.6 Snow Leopard font list
Temporary list of fonts installed in 10.6 - until Apple publishes its own
Snow Leopard Compatibility: SnowChecker
Tells you whether or not your applications will run under Mac OS X 10.6 Snow Leopard
Mac OS X 10.6 Snow Leopard review by John Siracusa
The best as usual
Mac OS X 10.6 Snow Leopard Compatibility List
A very complete list of what works and what doesn't in Mac OS 10.6 SL