I think I've got apple's StreamingProxy app working on my 660AV router 
setup.  I had a few compiler warnings, but I was able to do streaming 
quicktime to my iMac OS9.1 setup through the 660AV/NetBSD 1.4.2 router 
using streaminproxy.  I doesn't seem to work from my MacOS X setup 
though, so I'm not totally confident it is working (though quicktime 
does work through http).

If anyone is interested in working with me to perfect this setup, let me 
know!  I know for certain that it would work better with pthreads, but I 
didn't try to set that up right off the bat.

Patrick