Thanks for the post.
Our Electromechanical solution is available with Expedition and Board Station XE flows today. Our ECAD/MCAD collaborator is based on the ProSTEP iVIP standard PSI5. This standard is open to all adopters in both the PLM and ECAD world although we at Mentor were the pioneers and are the first ECAD vendor to have released code based on this standard. Some PLM vendors are in the process of adopting while others, like PTC, have fully adopted. I would recommend that you contact Siemens PLM and see where they are in terms of adopting the standard.