Woot! There have been these last weeks many things released to the public. First homebrew demos and libraries are now available, and I think there will be more and more things to come.
Now we can say that GameCube amateur development has really begun and that a developers community is growing! Some sites (including this one) have been "Slashdotted" and I got 1200+ downloads of "DevKitCube" GCC Builds in one week.
In the next days, I hope to host on this site a MacOSX build, and fix some stuff about the current DevKitCube releases. Wait and see :)