OS X Information - highest level of support is currently X.4.8

• Intel
    FAQs
    BootCamp Beta: Requirements
    Firmware: Know how to locate, download and install them

• Leopard (X.5)
    Sneak Peak

• Tiger (X.4)
    Printing: How to set it up
    Printing: How to create a PDF
    Support: General tips & fixes
    Update: Mac OS X 10.4.8
    Update: X.4.6 for Intel or PPC

• Panther (X.3)
    Chart of available updates
    Support: General tips & fixes

• Jaguar (X.2)
    Support: General tips & fixes

• General Systems
    Passwords: How to change them
    General Info: What is PRAM?
    General Info: Macintosh 101
    Printing: What are print drivers?
    Finder: Recommended system preferences
    Finder: Common Keyboard shortcuts
    Finder: Common Pointer icons and what they mean
    Serial Number: Where do I find it?
    Sleep: Why your Mac may not stay asleep
    Drivers: Download peripheral drivers

• Laptops
    MacBook: SMC Firmware Update 1.1
    MacBook Pro: The thermal paste question
    Battery: How to calibrate your battery
    Display: How to work with the lid closed
    Power: Why you should reset the PMU?

• Final Cut Studio
    Support: General tips & fixes

• iPhoto
    Tutorials: How to email, edit and organize photos
    Support: General tips & fixes

• iTunes
    How to copy music between authorized computers
    iPod: Troubleshooting
    iPod: Restoring to factory settings
    iPod: What to do if frozen
    Support: General tips & fixes
    Update: iTunes  
   
• Safari
    Support: General tips & fixes

• Spotlight
    Where does it search?
    It doesn't seem to be searching right. What do I do?
    FAQs and How-Tos

• Dashboard
    What is it and what's a widget?
    Where can I download them from?

• QuickTime
    Support: General tips & fixes
    Update: Quicktime
    Open WMV files: Flip4Mac or Windows Media Components

• DVDs
    What format is used when burned with the Finder
    How do I burn a CD/DVD?