dlink and longdesc

i have added longdesc to almost all the images.  i know i need to add some
better ALT tag description.  however, as the longdesc is not used, the
recomendation use is d-link.  do you agree?

i do not think we are going to get government and commercial designers to
add this or worse yet some designs are so intensive that the cost of rework
may justify not doing it.  

I would propose that a list of descriptions be kept on another page with a
copy of the image.  

would an alternative be if space could be made to make the link white so it
would be hidden to users.  could it be rendered by assistive devices or do
some devices not read text that is not visible?

comments?