Just saw a cool presentation on using Visio and PowerShell. The slides and presentation here is a re-recording of a session the author, Saveen Reddy, gave at the recent PowerShell Summit in Redmond. You can get the video here: https://vimeo.com/94408016. You can also get the materials from: : https://onedrive.live.com/redir?resid=1FF099EDB1C7EBFA!87363&authkey=!ABRswDeQYGR-Xi8&ithint=folder%2c.psm1.
Some useful tips on using Visio and PowerShell!