Old news by now, but I've had this thing since back when they were still a wired unit.
(http://i146.photobucket.com/albums/r243/kitsune_baka/Wireless_CC2USB.jpg)
http://www.ebay.com/itm/Mayflash-Wireless-Controller-Adapter-Wii-Classic-Controller-PC-PS3-/280775463340?pt=LH_DefaultDomain_0&hash=item415f8591ac (http://www.ebay.com/itm/Mayflash-Wireless-Controller-Adapter-Wii-Classic-Controller-PC-PS3-/280775463340?pt=LH_DefaultDomain_0&hash=item415f8591ac)
Works fantastically.
Mayflash WIRELESS Wii Classic Controller to USB Adapter (http://www.youtube.com/watch?v=5VjLI3rNkzk#)
And if the Classic Controller isn't to your liking, Mayflash is
also putting out adapters for PS3 Dual Shock and Wii U Pro.
http://www.mayflash.com/Products/NINTENDOWiiU/W009.html (http://www.mayflash.com/Products/NINTENDOWiiU/W009.html)
Yeah, yeah. I know "Everyone who has a Bluetooth dongle,
a Wiimote and Glovepie, Bluesoleil, MotionJoy can do this already."
These adapters were / are geared more towards lazy folks like me
who just want a straight up USB solution with Direct Input. Just like
how Gametap and the Wii Virtual Console are geared more towards
the people who have no idea that emulators and roms exist.
There's always going to be someone out there who'll buy...