Was surprised not to see this sort of thread up, but guess everyone is just excited for Halo 4. Either way, need help in regards to the challenges given to us in Halo 4 (in which there appear to be a ton)? Post here and hopefully someone will answer your question or offer you some help. Might also be a good place to put Challenges feedback.
Now, for a little shameless self-promotion. I will be putting guides up for Halo 4 challenges, like I did and am still doing for Reach, every morning they become available on my blog (http://facetioussincerity.blogspot.com/). Check it out if you want to.