The System Menu is software shipped pre-installed into every Wii which allows the launching of games from an officially Nintendo certified game disk, launching of Nintendo Certified channels and Virtual Console and WiiWare titles.
On an un-modded system, it is the first thing a Wii user will see when s/he turns on his/her Wii having pressed 'A' at the Health and Safety screen. An X denotes that no version is available for the applicable region.
|Version||JAP||USA||PAL||KOR||Release date||IOS||Changelog||CDN Availability||CDN Post Date|
|"1.0"||33||33||33||X||November 19, 2006||IOS9||"Launch-Day" menu shipped with early Wiis. (Does not report a version number.)||Unavailable||Unavailable|
|2.0||128||97||130||X||November 19, 2006||IOS11||First region-specific menu. Added SD support for savegames, "Country Settings", downloadable System Updates, parental controls, ability to rearrange channels.||97, 128, 130||November 18, 2006; November 30, 2006; December 5, 2006|
|2.1||X||X||162||X||January 10, 2007||IOS11||Update to support the News Channel going live||162||Jaunary 9, 2007|
|2.2||192||193||194||X||April 11, 2007||IOS20||"Resolved connection issues that affected a small number of users who connected online through a specific Internet Service Provider and supplied router."||192, 193, 194||April 11, 2007|
|3.0||224||225||226||X||August 6, 2007||IOS30 v1037||Channels can now display data gathered by WC24 (Weather, News). Clock display. The Wii Message Board button will now flash when a message arrives. You can now rearrange the order of your Wii Friends in the address book, scroll the message text by pressing the B button on the message screen.||224, 225, 226||August 6, 2007|
|3.1||256||257||258||X||October 10, 2007||IOS30 v1039||USB Keyboard support. New version of Internet Channel and Everybody Votes Channel||256, 257, 258||October 9, 2007|
|3.2||288||289||290||X||February 25, 2008||IOS30 v1040||"This update does not affect any prominently-used features or menus; however it does provide some behind the scenes updates that will improve system performance."||288, 289, 290||February 25, 2008|
|3.3||352||353||354||326||June 17, 2008||IOS30 v2576, IOS40 v2320||First attempt at blocking Twilight Hack. Shipped with fixed versions of IOS30, BC, MIOS.||352, 353, 354||June 13, 2008|
|3.4||384||385||386||X||November 17, 2008||IOS50 v4889||Second attempt at blocking Twilight Hack. New EULA. Supposedly has speed fixes for DVD and SD access. An enhancement was made to the Wii console's Parental Controls. USB keyboard support with the Mii Channel.||384, 385, 386||November 17, 2008|
|3.5||X||X||X||390||March 3, 2009||IOS52 v5661||First update to Korean Wii System Menu, Launches with new Shop and Region Select Channel||390||March 1, 2009|
|4.0||416||417||418||X||March 25, 2009||IOS60 v6174||SDHC support added and possibility to launch channels on an SD card. Also, an update of the Wii Shop Channel to download on a SD. A "transfer" button has been added in the Wii console's Data Management menu. Update to block the Twilight Hack. Users wishing to use homebrew must use Bannerbomb.||416, 417, 418||March 24, 2009|
|4.1||448||449||450||454||July 3, 2009; July 15, 2009, July 30, 2009||IOS60 v6174||Fixes the bug in Wii Sports Resort with the video of introduction.||448, 449, 450, 454||July 2, 2009; July 15, 2009, July 30, 2009|
|4.2||480||481||482||486||September 28, 2009||IOS70 v6687||Fixes Bannerbomb Exploit. Launches alongside a boot2 update (boot2 v4), and several preventative IOS versions (222, 223, 249, 250) attempting to block piracy and homebrew. Homebrew may still to be installed using Indiana Pwns or Comex's SmashStack beta or Bannerbomb v2. Also bricks region converted Korean Wii's with a 003 Error.||480, 481, 482, 486||September 28, 2009|
Please feel free to add more changelog entries. Some data taken from http://www.nintendo.com/consumer/systems/wii/en_na/systemMenuFeatures.jsp
With the development of BootMii, the idea of booting straight to Homebrew may soon become a reality. In light of this, there are a couple of projects out there to create a homebrew-friendly System Menu alternative, such as WiiMU.