From what I understand, BlackSn0w will be bundled into BlackRa1n RC3. You will have to jailbreak your iPhone with BlackRa1n first, then run BlackSn0w.
As a reminder, BlackSn0w will be the first solution to unlock the iPhone 3.1.2 with baseband 05.11.07. So all of you who accidentally updated your iPhone in iTunes and are now locked out of their carrier can rejoice!
As you can see, Icy is not part of BlackRa1n anymore which is probably due to the fact that the developers of Icy decided to stop maintaining it.
As usual, I will be updating the site with a BlackSn0w tutorial when it comes out. However, I will be flying from Los Angeles to Brisbane Australia when BlackSn0w is released tomorrow, so I might be a little late on delivering the news. My top priority when I land in Australia will be to find some internet and update the blog, so stay tuned!
UPDATE: BlackRa1n RC3 and BlackSn0w tutorials are up: