I wonder if it couldn't still be accomplished at this late hour. An RFC to reserve 32 bits of an IPv6 Address along with a logical (read: Easy to remember) remaining 96 bits might be in order.
The prefix should be all zeroes, so you get something like: ::12.123.99.222 Which is not that hard to remember. :P
In fact I'm not sure why it wasn't done that way to begin with, unless IPv6 fixes a bunch of other problems I was not aware of