[ this might be better for macbsd-development, but... ]

> Q1:  Was the compiler warning above important? and how do I fix it?

No.

> Q2:  What is the device 46/0 that the kernel can't seem to find, and how
>      do I fix it?

I'm not sure what device it thinks it's trying to find, but it should be
looking for 4/0 or something like that instead of 46/0.  Are you booting
with /netbsd or /netbsd.jeff (or whatever)?  savecore will attempt to
lookup the value of dumpdev using the symbol table in /netbsd.

> Q3:  Any idea why the system hangs after a few minutes?

That's probably the good ol' keyboard hang.  Brad Grantham is working on
a fix for that.  Grab dt and try running that--it should keep the hang
from happening so easily.

-allen

-- 
Allen Briggs - end killing - allen.briggs@vt.edu ** MacBSD == NetBSD/Mac **