It would be a great deal to enhance the wiki processor to allow one to write a class-filename or a resource-filename and let trac automatically link to all occurences of this file in the source code.
Example: You write in a commit satement or a normal wiki page the word BugReporter? and automatically get the link to any file named BugReporter?.EXT (e.g. source:/autotracplugin/0.9/bugreporter/php/BugReporter.php) as result.
If there are more than one matche in source it would be very nice to get an on-mouse-over pull-down-menu with a link to every matched source file.