• iTunes 10.6 (download here) adds ability to play 1080p HD movies and TV shows from iTunes Store. Also includes many improvements for iTunes Match, including:
  • Improved song matching
  • Improved album artwork handling, downloading, and display
  • Addresses an issue where songs may skip when playing from iCloud
• iOS 5.1 Software Update
• About the security content of iTunes 10.6 (none mac os related?)
• About the security content of iOS 5.1 Software Update

• iPhoto 9.2.2
• GarageBand 6.0.5

Apple also posted updates to iPhone Configuration Utility (v3.5 for Mac and Windows) and iCloud Control Panel for Windows v1.1.
  

Feature	Summary
New interface	Fast, visual access to all content choices
Movie purchases in iCloud	Support for buying movies on Apple TV and playing back purchased movies from iCloud
Genius Recommendations	Recommendations for content on the iTunes Store based on previous rentals and purchases
Screensaver photos	New National Geographic photos built-in for screensaver
On-device sign-up	On-device sign up for content partners on Apple TV using your Apple ID

Here's the Apple doc on Security content of Apple TV 5.0 software

  

• Watch New iPad Event Keynote
  
  Links to Updated Web Pages
• New iPad product pages and specs page
• Apple TV product pages and specs page
  
  Related Apple Press Releases:
• New iPad w/Retina Display, A5X Chip, 5MP iSight Camera & 4G LTE
• Apple Completes iLife for iOS w/iPhoto & Updates to iMovie & GarageBand
• Apple Brings 1080p High Definition to New Apple TV

Apple TV remains $99 (US). New iPad available March 16, starting from $499 (US). iPad 2 (16GB) now from $399 (US). Here's a clip about software/iOS updates:

"...iOS 5.1 and iTunes 10.6 are available today as free software updates. iPhoto, iMovie 1.3 and GarageBand 1.2 are available today for $4.99 (US) each from the App Store (www.itunes.com/appstore). Keynote 1.6, Pages 1.6 and Numbers 1.6 are available today for $9.99 (US) each from the App Store. Updates are available for free to existing customers..."

The Apple store is now updated w/new products.

  

• About the security content of Apple TV 5.0 software
• About the security content of iTunes 10.6
• About the security content of iOS 5.1 Software Update
  
  
• Using RAW images with iPhoto for iOS
• iPhoto for iOS: Device will lock when playing a slideshow on an external display
• iPhoto for iOS: Unable to add music to a slideshow
• GarageBand for iOS 1.2: Optimizing Jam Session network connectivity
• GarageBand for iOS 1.2: Punch in/out unavailable during a jam session
  
  
• iOS 5: Video not saved if device unexpectedly turns off
• iOS: Connecting to the Internet
• iPhone 4S: About Siri
• iPhone 4S: Troubleshooting Siri
• Siri: Japanese language availability
• iPhone: About the Cellular Data setting
• iPhone and iPad: Using cellular networks while in another country
• Sprint: Disable International Assist while in Puerto Rico
• iPad: Using the iPad Camera Connection Kit
  
  
• iTunes Store: About HD TV Shows
• iTunes: Purchasing and viewing HD videos
• iTunes Store: Which types of items can I buy in my country?
• iTunes Store: About Mastered for iTunes
• iTunes: How to add a computer or iOS device to iTunes Match
• iTunes Store: Frequently Asked Questions for iPhone, iPad, and iPod touch
• Downloading past purchases from the App Store, iBookstore, and iTunes Store
  
  
• Apple Configurator: Backing up and restoring data
• Apple Configurator: Using Volume Purchase Program (VPP) Redemption Codes
• Apple Configurator: Coordinating device names with labels or slot numbers in carts and racks
  
  
• iPhone Configuration Utility 3.5 for Mac OS X
• iPhone Configuration Utility 3.5 for Windows
• iCloud Control Panel for Windows v1.1

• OS X 10.7.3 Supplemental Update (fix problems restoring from TM Backup)
• Mac Mini Core 2 Duo CPU Upgrades page updated
• Reader Report: Windows 8 (beta) in Parallels 7 (VM) on Mac Pro
• 8800GT owner report on Nvidia posted Lion Drivers (Fixing Black Screen/Crashes in OS X 10.7.3)
• Feedback on Late 2008 MacBook Pro EFI Update (Display Flicker Fixed)
• More Feedback on Late 2008 MacBook Pro EFI Update