Dear gang,

Just put together a macro that appears to do what's desired. However, is  
there a cleaner, more ConTeXt-like way to do this?

=======
\newcount \MQT
\MQT=1
\define[1]\NUM{%
\framed[offset=overlay,frame=off,background=color,backgroundcolor=green]
{\starttabulate[|c|]
\NC \mbox{\the\MQT} \NR
\NC #1 \NR
\stoptabulate}%
\advance\MQT by 1
\hbox{}}

\startTEXpage
\dorecurse{5}{Unnumbered Text \NUM{Numbered Text} }
\stopTEXpage
=======

See attached. Thanks in advance for any suggestions for improvement.

Best wishes
Idris
-- 
Idris Samawi Hamid, Professor
Department of Philosophy
Colorado State University
Fort Collins, CO 80512