This is awesome news from the GameCube Linux Wiki:
24 Feb 2008: Long time, no see Although we haven’t posted any news in the last 2 years, we have silently continued our work keeping the kernel patches up to date. With the latest 2.6.24 release we have added support for the USB Gecko adapter as a console and terminal, so you can now logon into your gc-linux distro using minicom or HyperTerminal (TM). And last but not least, we have finally run natively Linux on the Nintendo Wii through Team Tweezers’ twilight-hack. We have released a small usbgecko-enabled Proof of Concept mini-distro to prove it. Did I say have fun? :)
On a side note, I’m trying to put some instructions together for getting a dev environment set up with libogc and devkitPro. I’m not going to be able to test without a Wii, but this looks like a good place to start. Shout out in the comments if you know of any good Wii dev howtos that have sprouted up.