I installed TC1 x86_64 DVD last night.  I only hit a few minor issues.  It prompted me for a network connection which I just cancelled and FirstBoot doesn't run to setup your initial account.  You can't login graphically as root after the install so you just have to flip to another console and create the user manually on the command line.  Other than those two minor things, it has been working quite well so far.

   -- John Watzke