Can I use your plugin to redirect links to pages of the form …/?author=n to …/?bbp_user=n where n is the id number of the user? Note that I am not trying to change the look of the link, but the actual link.
Also, the site I am helping administer is hosted on GoDaddy–I found this in statement:
Some hosts (e.g. Godaddy) may not show or allow you to edit .htaccess if you install WordPress through the Godaddy Hosting Connection installation.
at http://codex.wordpress.org/Using_Permalinks–does that mean that your plugin wouldn’t work?