In this talk I demonstrated the following WSE 2.0 example for WS-Security implementation, followed by a demonstration of .NET and BEA interoperability. The BEA interoperability sample is available from the InteropWarriors site, however keep in mind that this requires you to set up a BEA Workshop 8.1 machine, and deploy the project files accordingly. The .NET examples shows the end to end code used for WS-Security that is also demonstrated with Workshop sandwiched in the middle, so this will still be useful to you for the .NET perspective.
I also have a resource site where other WSE samples have been posted, many that do not require the database setup:
This may help those of you that are newer to the subject get your arms around it as well.