Hans, Gerben,

No luck. Got the fonts at:

http://www.janusz.nowacki.strefa.pl/kurier.html

Installed to proper directories. But the sample source below did not  
work?

Couple of things?

1. Do I have to also do an updmap or enable or some such thing?

2. I note that on my office system, /usr/local/teTeX is owned by  
root:wheel. But done in my fonts directory, some files are owned by  
darnolddarn:admind and some by root:admin. Could this be a problem?

This file:

\definetypeface[david][rm][sans][iwona][default][encoding=texnansi]
\definetypeface[david][mm][math][iwona][default]

\setupbodyfont[david,ss,10pt]

\starttext
This should work.
\stoptext

Produces junk1.log:

This file:

\definetypeface[david][rm][sans][iwona][default][encoding=texnansi]
%\definetypeface[david][mm][math][iwona][default]

\setupbodyfont[david,ss,10pt]

\starttext
This should work.
\stoptext

Produces junk2.log.