Is there any way I can get inverse video on the console (i.e. white on black)?
Yes. You can either dig into the console source code (look at ite.c), which would be rather difficult, or you can get a copy of the dt program. The dt utility supports a number of useful features, including inverse video. You will need to modify the config.h file to define INVERSE and recompile in order to get this mode. You can find the dt utility at: ftp://ftp.macbsd.com/pub/NetBSD/utils/dt/dt-1.1.5.tar.