I think it's a great idea. There have been several build threads that were started and now complete that I have read all the way through. Some of the on going ones I have also tried to follow, but as others have said they are hard to keep track of. Many I have found only because the original poster has a link in their tag line.
There is a lot of information in these that anyone could benefit from. I have learned a lot from them and 'borrowed' (or would that be stolen?) many of the builders techniques. As tplee mentioned, Alex's was one of them, he had some great tips for using Atlas track which is what I have.