wearyourtruth, My '89 Cannondale has had 130 mm hubs in it's 126 mm dropouts since the '90s without a problem. If using the longer hub causes a failure then there was a problem to begin with, regardless of frame material, IMHO.
kimmo, I like OC drilled rear rims, and attribute my mountain bike's long lived rear wheel to them, but until road bikes go to 135 mm (which I wouldn't use in any 126 mm aluminum frame) I don't think they'll ever become more popular than they are now.
Brad