the phone number for ordering stuff from IBM is:
you can also get them from Motorola too, if it makes you more comfortable.

you should get four things:

SA14-2007	PowerPC 601 User Manual
SA14-2044	PowerPC 604 User Manual
SA14-2058	604 Addendum/604e Supplement
SA14-2089	PowerPC Microprocessor Family: The Programming Environment

and maybe even the 603 manuals, if we ever support the 603 machines (i hope so,
thats all the notebooks, and most of the department store Macs)