We haven't tried adding any CORBA binding component into FUSE ESB. I know there has been some discussion on the servicemix-users mailing list about this. I notice that someone has also created an enhancement recently at Apache. If you want you could try and use Yoko today and add your experiences as comments to this issue. I would recommend that you watch this issue.
With respect to a commercial version of the binding component, there isn't a JBI binding component, however you could use Artix to route from a CORBA endpoint to a SOAP/HTTP endpoint in a CXF BC fairly seamlessly. Artix uses Orbix under the hood for the CORBA transport.