jjhartley@gmail.com wrote:

> > > More importantly, how can I boot into single-user mode?  Am
> > > I missing something here?
> >
> > If you can get "Cobalt:" prompt after the "We serve it.." banner
> > by typing any key, you can specify it by "single" strings on
> > the prompt as the following:

> I'm not seeing the "Cobalt:" prompt at all.

Did you try this?
>> Press the space bar while the diagnostics run to halt the autoboot process.
(sorry it's not any but the space)

I've also put patched GENERIC kernel and bootloader
which parse options on loader's prompt:
http://www.ceres.dti.ne.jp/~tsutsui/netbsd/netbsd-cobalt-GENERIC-20070805.gz
http://www.ceres.dti.ne.jp/~tsutsui/netbsd/boot-cobalt-20070805.gz

You could specify "-s" on "Boot [wd0a:netbsd]:" prompt.
(see <sys/boot_flag.h> for details)
---
Izumi Tsutsui