(the original post from Sept. 19th follows)
Despite the date on the page, I didn't find it there until early 9/19. (I've been checking there daily since the first report of a Mac Quadro card not supported in OS X 10.8.5.)

"Quadro & GeForce Mac OS X Driver Release 313.01.03f01
for Mac OS X Mountain Lion v10.8.5 (12F37)

New in Release 313.01.03f01:

• Contains performance improvements and bug fixes for a wide range of applications.
  
• Includes new NVIDIA Driver Manager preference pane.

Release Notes Archive:
This driver update is for Mac Pro 5,1 (2010), Mac Pro 4,1 (2009) and Mac Pro 3,1 (2008) users only.

Supported Products:
GeForce 600 series: GTX 680 for Mac
GeForce 200 series: GTX 285 for Mac
GeForce 100 series: GT 120
GeForce 8 series: 8800 GT
Quadro series: K5000 for Mac, 4000 for Mac
Quadro FX series: FX 5600, FX 4800 for Mac

CUDA Application Support: In order to run Mac OS X Applications that leverage the CUDA architecture of certain NVIDIA graphics cards, users will need to download and install the CUDA 5.5.24 driver for Mac located here. (v5.5.24 (2013.08.13) as of 9/19/2013.)."

The driver page's "Additional information" Tab has their installation guide and details about the new NVIDIA Driver Manager preference pane. The Graphics Driver Tab allows you to switch between the new ('web') nvidia driver or the driver included with OS X 10.8.5. This 'web' driver prefence setting is stored in NVRAM apparently, as they note clearing nvram will restore use of the original OS X 10.8.5 driver. (More details on 'Addtl Info' tab.)

OS X 10.8.5 Suppl. Update breaks Nvidia Quadro/Geforce Card Driver Update
See Oct. 7th report that the Oct 3rd released Suppl. Update for OS X 10.8.5 (12F45) breaks Nvidia Driver Update for OS X 10.8.5 (12F37).
  

• iOS 7.0.1 update (for iPhone 5c/5s)
• iOS 7 review (anandtech)
• iOS 7 Bug Lets Anyone Bypass iPhone's Lockscreen
• 4 privacy settings you should enable in iOS 7 immediately
• iOS 7 found to sport new networking tech
• Apple Configurator (app) v1.4 (app store/free)
• iPhone 5/5S/5C Teardown (requires javascript)
• GameCase iOS 7 game controller
• Review: Coast, Opera's Minimalist New iPad Browser
• DTS Play-Fi Wireless Audio Now Supports iOS (DTS)

• About Apple Configurator 1.4
• Apple Configurator 1.4: Updating from an earlier version
  
  
• iCloud security and privacy overview
• iCloud: Troubleshooting iCloud Bookmarks and Reading List
• Troubleshooting iCloud Photo Sharing and Shared Photo Streams
• iCloud: Find My iPhone Activation Lock in iOS 7
• iOS 7: About the Drafts folder in Mail for Exchange Accounts
• iOS: Understanding Personal Hotspot
• iOS: Understanding notifications
• iPhone: About unlocking
  
  
• AirPrint Basics
• Final Cut Pro X, iMovie: Some Panasonic camcorders that support 1080/60p and 1080/50p require mounting the SD card with a USB card reader

• (PCMag's) The Fastest ISPs (2013)
• Google Makes QuickOffice Apps Free, Adds 10GB of Storage
• We need to stop masking passwords
• Nirvanix Suggests Users Move Their Data, Shutdown Imminent
• The Honey Launderers: Uncovering the Largest Food Fraud in U.S. History
• Hands On With Grand Theft Auto V
• Blu-Ray Review: The Fly (1958)
• Nokia Lumia 625 (short) review
• Top Gear's big 50, distilled

Wednesday Sept. 18th, 2013 News Archive
• iTunes 11.1 released (info/download)
• iOS 7 update (Apple)
• 6 reasons not to immediately upgrade to iOS 7
• In-Depth reviews of iPhone 5S and iPhone 5C
• The Lord of the Rings: War in the North arrives for Mac (feral interactive)
• Left 4 Dead 2 Update (with Mac/Linux Crash fixes)
• The Mac mini as a BYOD computer
• Structure Sensor Turns Your iPad into a 3-D Scanner
• Chrome for iOS 7 update
• Skype for iPhone v4.12
• Apple Support/How-To/Troubleshooting Article Updates:
  - About iTunes Radio
  - About the security content of iOS 7
  - About the security content of Xcode 5.0
  - About the security content of iTunes 11.1
  - iTunes: Turning on Activation-only Mode
  - iTunes: Specific update-and-restore error messages & troubleshooting
  - Mac computers: About startup tones
  - Mac Pro: How to remove or install memory
  - Wi-Fi: Unable to connect to an 802.11n Wi-Fi network
  - Using Game Center
  - iOS and OS X: Using Game Center behind a firewall
  - iOS: Using AirDrop
  - iOS: Device not recognized in iTunes for OS X
  - iOS: Troubleshooting Wi-Fi networks and connections
  - iOS: Unable to update or restore
  - iOS: Restore error 3194 or 'This device isn't eligible for the requested build'
  - iOS 7: Understanding call and message blocking
  - iCloud: Find My iPhone Activation Lock in iOS 7
  - iCloud: My Photo Stream troubleshooting
  - iPhone: Troubleshooting issues making or receiving calls
  - Some car stereos require a firmware update for AVRCP 1.4 Bluetooth compatibility
  
• Other New/Reviews/Tech/OT:
  - iCloud Control Panel 3.0 for Windows
  - Google to form health company led by Genentech chairman
  - FTC Settles With 'Gift Card' Text Message Spammers
  - Review: Homeland Second Season (Blu-ray)

For links to older news pages, see the Archives.