Unless you work on the WSE team, I doubt it, at least not at the time of writing.  I assume this because there is basically only one article on the subject written by Mark Fussell, the Lead PM for WSE, that is an intro to it.  Fine, it is a CTP and only works with a beta of another product (.NET 2), so I can understand that it's not widely adopted.  But I still need answers, as I'm sure others do and will.  So, if you have experience with WSE 3 (and perhaps knowledge of WSE 2 would help), please take a look at these questions:

1) UltimateReceiver.GetClientToken Returns Null

2) Secure Conversation from an ASP.NET Session

If you've got the answers, please either respond on the NG or here. :)