[plt-scheme] Creating PLT archive from SVN sources

Is there a way to create a .plt file (such as with 'planet
--create-archive') from subversion sources, and automatically exclude
.svn subdirectories?  As it is, when I create a package to submit to
PLaneT I have to duplicate my source directory and strip out the .svn
directory manually.  Having either a "--exclude" option or a command
to remove those directories after the fact would be easier than
copying, modifying, archiving, and deleting.

--
Carl Eastlund
"Cynical, but technically correct."