So I was looking around the web today and saw that an untethered jailbreak was being worked on for 4.2.1 for before Christmas. "Woohoo!" I thought. Looked into it more, and I came across redsn0w 0.9.6b6. Apparently, (well, going by what wikipedia's saying :P) 0.9.6b6 can jailbreak 4.2.1 untethered for 2G MB models already? Is this true, or do I need to wait a few days for the upcoming jailbreak?