Yes it is released, i just got a message from Nintendo, so i updated and there it is!
Wait, lemme get the message up!
"To all our loyal Wii Users,
Many thanks for your continued support and enjoyment of Nintendo Products.
We're proud to announce that the forecast channel goes live today!
Using this channel you can check the weather forecast in your region and spin the globe to with the weather all around the world.
Press the "Update" button on the right to update your Wii Menu"
YAY, finally... hmmm wonder when internet is coming up...