Untethered Jailbreak by Christmas?
A now-you-see-it, now-you-don't tweet from @MuscleNerd has again raised hopes that we'll see an untethered 4.2.1 jailbreak by Christmas. Having responded to someone asking about the JB that Christmas was "an achievable deadline," he then deleted the tweet, leaving open questions as to whether he thought that was too confident a statement.
Earlier this month, @comex had promised a untethered jailbreak by Christmas in a tweet. Soon thereafter, @MuscleNerd showed off a video
of just such a jailbreak that used "mysterious 4.2b3 hashes Cydia kept for you." In a tweet announcing the video, @MuscleNerd called it a "backup plan" to the more extensible jailbreak @comex is working on.
In any case, it looks like the Dev-Team guys are feeling confident about their progress, so chances are good that we'll see an untethered jailbreak for 4.2.1 in our stocking sometime in the week to come.
Source: Redmond Pie