This workflow-script reads a fcpxml-file in and outputs separate Nuke-files for each video that is in the Final Cut Pro X sequence. Use it as shell-script or Automator workflow.
Edit: Meanwhile the script got updated to v1.2. This new version additionally generates a .synInfo file which is a custom file-format for importing your shots into Syntheyes. It feeds Syntheyes with all needed data for tracking a shot. Read more about the changes in v1.2 at Nukepedia.
Download from Nukepedia:
Edit March 2nd: What started as a simple shell script has grown to an application. It´s called ClipExporter and exports Quicktime Reference movies, Nuke or Syntheyes files. Please visit http://clipexporter.mindtransplant.com/ and watch the demo video.
This script will not be supported or updated anymore.