🚀 go-pugleaf

Is there some trick I am missing to make a figure come out across the
full width of the page in a document that's in two-column format?  I
am using figure*, so the caption is nicely centered, but even though I
use \centerline, the psfig itself is shifted over to the left (i.e.,
not within the margins).  Also, how small does such a figure have to
be before LaTeX will print it on the same page with text, instead of
on a page by itself?

Please help clue me in.  Here's my code:

\begin{figure*}
\centerline{\rotate[l]	%the rotate is in here because the figure is
			%drawn in landscape mode
	{\psfig{figure=myfigure.ps,width=\textwidth}}}
\caption{Blah blah blah}
\end(figure*}