Dear all, Trac is one of the hosted apps of sf.net so it took only a few mouse clicks to install it. It is available now at http://apps.sourceforge.net/trac/lyx/ , browse source already works.
I checked sf.net help and issue tracker. There is no simple way to import bugzilla entries to sourceforge issue tracker or any of the hosted apps. You can backup databases of, e.g., trac, but you can not import or directly access them. However, sf.net provides a complete LAMP environment so we can install any PHP application we want, and use the provided MySQL databases. If I can get a bugailla -> mantis dump (http://www.mantisbt.org/bugs/view.php?id=7469), I can try to install mantis as http://lyx.sourceforge.net/mantis and import the bugs). I tend not to install bugzilla on sf.net because it uses a lot of perl stuff. With web + subversion + trac, I believe lyx.sourceforge.net is usable and it is time for us to switch. Cheers, Bo