verb-sql.tex seems not to work correctly. Is it broken or am I doing  
something wrong?

I call it as this:

\definetyping[SQL][option=color,numbering=line,bodyfont=9pt]
\defineoverlay[ifsqoverlay][\overlayfigure{IfSQ-overlay.pdf}]
\setupcolors[state=start]
\setuplayout[leftmargin=10mm,rightmargin=0mm,footer=0mm,header=5mm]
\setuppapersize[A4,landscape][a4,landscape]
\setupbackgrounds[page][background=ifsqoverlay]
\setuptyping[SQL][palet=colorpretty]
\starttext
\typefile[SQL][]{test2.txt}
\stoptext

I get rather strange coloration. I would expect comments to be colored  
differently, but only start and end character are. When I run PL/SQL  
through the formatter, variable names as bar_foo get only the _  
colored, etc.