Unsupported machines
   
              o   sun4d (e.g. SPARCcenter 1000 and SPARCcenter 2000)
   
              o   sun4u and other UltraSPARC based machines.
   
                  There is a separate sparc64 port for these machines.  Refer to
                        http://www.netbsd.org/Ports/sparc64/index.html

the way this is worded is bizarre.  it should be moved to a different
section, and out of the "unsupported" section.
   
        The minimal configuration requires 4 MB of RAM and ~60 MB of disk space.
        To install the entire system requires much more disk space, and to run X
        or compile the system, more RAM is recommended, as NetBSD with 4 MB of
        RAM feels like Solaris with 4 MB of RAM - slow.  Note that until you have
        around 16 MB of RAM, getting more RAM is more important than getting a
        faster CPU.

does netbsd/sparc actually work with 4MB ?
   
              o   bpp (bi-directional parallel port, built-in and sbus card)

this is supported now i believe ?