Unofficial PearPC, the PPC emu for Windows, heres whats new:

• CPU: stfiwx implemented
  
• config: "ppc_start_fullscreen" for starting in fullscreen mode
  
• POSIX: allow bridging of tun device
  
• use FISTTP instruction on SSE3 aware processors
  
• merged native_cd branch from Alexander Stockinger
  
• endianess fixes
  
• warn that the generic CPU is slow
  
• better detection of HFS+ volumes
  
• support for DVD-Drives
  
• correctly check for NASM
  
• Work-around for graphic errors in Mac OS X 10.1

> Get from here from this site is news that some have had it running OSX faster
> than on native hardware I quote
> 'I am actually emulating OS X faster than some native machines can run it.
> According to some mac "freaks", OS X's average installation time is a half an
> hour to an hour (usually closer to an hour) and I installed OS X Panther on my
> Athlon64 3200+ in 20 minutes. .4pre seems very stable and now also there is
> sound support. Although the sound is claimed to work, I have yet to get it to
> work. '

Yeah, and according to 99.9% of the comments on that very same site, it doesn't really count as being "faster than native hardware" if you're comparing the install time on an Athlon XP 3200+ to the install time on a... 300MHz G3 processor.