Well, PlaceHistoryHandler uses an Historian (DefaultHistorian by default, which delegates to the History class), so you can easily replace the implementation there. But really, I wonder how you'll make it work OK with the back/forward browser buttons, particularly when going back/forth not a single "place" at a time (i.e. open the back/forth menu and go several steps back/forth; similar issue with bookmarks).
IMO, what you're trying to do is simply impossible. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.