Hi.  The new version of tme, 0.6, fixes many bugs in the Sun 3 emulation, 
and can also emulate a SPARCstation 2.  NetBSD 3.x seems to run pretty 
well on the different emulations.

However, please remember that tme comes with no warranty.  Don't
trust it to do anything correctly.

  In particular, do not trust tme for floating-point work.  The
  m68881 and sparc FPU emulations may not be exact.

tme is meant to be very portable.  It should work on most Unix-like 
systems, including on 64-bit CPUs.  Instructions on how to download, 
build, and use it (including some screenshots) are at:

http://csail.mit.edu/~fredette/tme/index.html

Many thanks to Arthur Townsend, Izumi Tsutsui, and Nick Hudson, for
finding many bugs and writing fixes - especially Arthur, who did a lot 
of torture-testing of the m68k/m68881 emulations.

The code is still rough and the distribution isn't too user-friendly, but
if you follow the instructions carefully, and have experience installing
NetBSD on Sun machines, you just might end up with some emulated Suns.

-- 
Matt Fredette