As a reference,
I start from
http://meeting.contextgarden.net/2008/talks/2008-08-24-taco-typescripts/liberation.tex

Also
http://context.aanhet.net/svn/contextman/context-reference/en/co-fonts.pdf
and
http://context.aanhet.net/svn/contextman/context-reference/en/co-typography.pdf

and look into base/*
(yes egrep is you friend)

For what it's worth, I have been using the command "texexec" to
> process my tex files, am using a context minimals downloaded about two
> months ago, and am running Linux.
>

I'm on linux too and I use only mkiv
ie luatex + context

I always compile with
$>context <yourfile.tex>

Keep in mind that mkiv is beta ...

-- 
luigi