UNLOCK IS HERE!
FULL TUTORIAL IS HERE FOR OS X USERS!!!
Daeken, Darkmen, guest184, gray, iZsh, pytey, roxfan, Sam, uns, Zappaz, Zf, plus Nightwatch for the toolchain were responsible for this, and it is HERE! WHA HOO!
I have updated the guide to reflect the new GUI app for unlocking, it is much easier. Link updated in this post. It is here.
If you would like your voicemail to keep working correctly, follow this guide. NOTE: This already works with carriers who's name shows up in the top of the iPhone, namely, T-Mobile.
Check the F.A.Q. before asking questions!