Evasi0n progress is now at 98%, meaning that the long-awaited untethered jailbreak is coming up shortly. It should be happening this week as the progress is that close to completion.
Anyway, i'm not quite interested to perform an upgrade to iOS6 since it doesn't add too much interesting feature which benefits me IMHO. iOS 5.1.1 so far has been fantastic and it's working for me. But it will probably change later on when my curiosity is raising up again.
If the release is in reality, it would be a big release from the evad3rs team who have been working hard to make this release possible. It's been a long time since untethered jailbreak is able to win against Apple security protection in their iOS 6.