\nopagenumbers
\newbox\leftside
\newbox\rightside
\long\def\entry#1{\let\p=\par\def\par{\strut\p\strut}#1}
\long\def\mitem#1#2{\parindent=0pt%
\global\setbox\leftside\vtop{\hsize70pt%
\everypar{\strut}\overfullrule0pt\noindent
\strut#1\strut}
\global\setbox\rightside\vtop{\tolerance=20000\hfuzz4pt%
\def\\{{\tt\char'134}}\hsize142pt
\everypar{\strut}\noindent
\strut#2\strut}
\box\leftside&\quad\box\rightside\cr
}
%
%
%\vbox{\tabskip=0pt%\offinterlineskip
%\halign{#&#\cr
%\mitem{This is on the left hand side}{While this
%very much longer entry is supposed to go on the right.
%I may have to say it a few times, just to get it right
%and to test it properly, but I think I can.
%\par
%And try a paragraph too}
%}}