Yay, finally they've merged multi-tty into the CVS head of Emacs.
I'm downloading it now, it's been soo long since I've used CVS. I use Subversion now almost exclusively. What was funny was that the multi-tty branch of Emacs used an even more advanced code repository, bazaar.
Anyways, it was a little hard to find this info, which helpfully gave me:
cvs -z3 -d:pserver:firstname.lastname@example.org:/sources/emacs co emacs