WCF Versioning Flowchart
I ran across this post tonight from Craig McMurtry (author of Microsoft Windows Communication Foundations: Hands-on) with a flowchart showing how to version WCF services.
http://blogs.msdn.com/craigmcmurtry/archive/2006/07/23/676104.aspx
Thank you Craig for taking the time to think through these paths (and for the beautiful artwork J)!!!
Cheers
jk