> Filesystem		kbytes   used   avail  capacity  Mounted on
> /dev/sd0a		 14939   2913   10532     22%    /
> /dev/sd0g		183400  84249   80811     51%    /usr
> /dev/sd0h                72929     95   65541      0%    /home
> 
> Is there any way I can install NetBSD with this configuration alone, or 
> will I have to go out and *gasp* _buy_ another disk?

This should be sufficient.

Of course, disk is cheap, maybe 30 U.S. cents/MB so getting another disk
shouldn't be that bad.