Non-profit IP Registry

Two questions come to mind with this:

One:
   How will portable/non-portable address space be effected. Does the mean
that if I have non-portable address space, I can charge customers for
address space, and if it is portable, they have to pay $2500 per /24 to
have it registered to them?

Two:
   If an entity has address space already and does not require more space,
do they have to pay the fee or is this going to be grandfather claused? I
know with domain names it was not that way, but that is only 50 bucks,
$2500 or more could put a lot of business off the net.

I guess this will make the routing table size come to a sudden and
screaching halt!

Eric