Several case makers read these forums for those exact concepts, in fact - do you really think that companies Cooler Master and Antec sit around and just dream up these great ideas in a bubble? Of course not - they look at some of the mods going on and find where people see weak points in their designs, and try to improve on them for the next round.
With that in mind, I hope someone's paying attention to oldnewby's build, dubbed Cygnus X1. He's become tired of the lack of component accessibility in cases lately, and has designed a scratch build centred around the ability to pull out the drives and motherboard in one chunk for easy access - the board on one side, the drives on the other.
Check it out at Bit Tech.