The original Wii was released back in November 2006 and has been hacked (and even fully emulated) for many years with a pretty beefy homebrew library as evidence of this. Fast forwarding 6 years to 2012, Nintendo released the cheaper red coloured Wii Mini which was effectively a normal Wii but without many features including GameCube support, only one USB port, reduced video-out capabilities and no internet or SD Card support. As a result of the latter two omissions, existing Wii hacks such as Letterbomb and FlashHax were rendered useless on it and this left it unhackable for many years.
This changed thanks to the work of FullMetal5 who managed to find and exploit a vulnerability in the console’s Bluetooth stack a little under three weeks ago. Now, he has kindly released Bluebomb which is a complete hack allowing you to get HackMii on your console and install the Homebrew Channel so that you can enjoy the full hacked Wii experience! Furthermore, the exploit is also compatible on the regular Wii console although using it takes more work than Letterbomb so Wii owners should probably stick with that exploit.
To get Bluebomb and finally liberate your Wii Mini, check out this link and follow the instructions. A Linux computer is needed in order to run the exploit on your system so make sure you have a Live CD on hand GBATemp has advised to wait a bit before doing any permanent modifications to the NAND as current tools aren’t tested with the Wii Mini.