Given the number of new ISPs that come to them for provider independent addresses, they isn't enough IPv4 address space to do the above with. Are you sure of this? Even if they start allocating out of the former Class A space?
Do the math. Currently, about 50 new ISP approach InterNIC for address space per week. This is up from about 25 6 months ago, so the growth rate currently quadruples over a year. Assuming a constant rate, however, you'd consume all remaining address space in about 8 years. This does not include large ISPs like Sprint, MCI, etc. that are allocated /13s and /14s when they need new blocks, nor does it include the growth from the AP or European regions. Oh yea, don't forget the effects of the rush on address space you'd likely get when people realize the address space is running out very quickly.
After all, getting a reserved /16 out of the former Class A space wouldn't exactly be free because you would need to buy a NAT in order to avoid renumbering down the road so not *ALL* ISP's are going to demand one of these.
I don't see the point. If you are going to propose using a reserved class A, why not use net 10? Regards, -drc