while this is true, i think a fairly good point is that the hardest part of making a part like a brake caliper bracket is manufacturing the bracket. in this example, you are either going to have to machine it from stock, or weld two pieces together at the correct offset. either way, you'd have to be fairly decent at either skill to make a usable part.
and while brackets will have research time involved, i'd say that anyone capable of fabrication is also capable of engineering the part. i'd wager that most of the posters in this forum are lacking in at least one of the three main categories to manufacturing their own parts; skillset, time, and tools.
that's why i don't believe that having a drawing will do most people any good, and they will buy the parts from the vendors like always. the people who will benefit from these specs will be the people that would have built these parts themselves anyways.
either way, it doesn't seem like anyone is interested in doing this anyway. especially since i had made a similar thread eariler that didn't even get a reply: http://forums.hybridz.org/showthread.php?t=127533