Note: UseModWiki 1.0 includes a basic "intermap" file with a few entries. You can copy this to the $DataDir and add your own entries. (You may need to change the permissions of the "intermap" file so that the wiki script can read it. On Linux or other Unix systems the command
chmod ugo+r intermap should make the file readable.
Also, in 1.0 you can use links beginning with "Local:" or "LocalWiki:" to point to the current wiki. This local-link syntax is mostly useful for special actions like those on the System page. For example, Local:action=version will link to the current wiki's version page.
UseMod http://www.usemod.com/cgi-bin/wiki.pl? Google http://www.google.com/search?q=
UseMod:UseModWiki [UseMod:UseModWiki Go to usemod!!] Google:UseModWikiTo generate, respectively
As you can see from the google example this is powerful enough to let you link to more than other wiki sites.