Here is the set of changes that got me a working 2.6.15-rc1 x86-64 UML under 
PLD Linux.  This includes several patches from Jeff (two of which I had to 
apply by hand because the hunks didn't match any known Linux kernel).

There shouldn't be anything new here, I just wanted to make sure that 
everything needed was listed in one place.  Here's hoping -rc2 works out of 
the box. :)

Rob