I am writing an application as a web service.  I require that clients be
notified of certain events, and am stuck at this point.  I am looking for
pointers.  Should I go with the Plumbwork Orange implementation of
WS-Eventing and hope when the eventual MS implementation of it comes out,
there won't be any major changes?  Has anyone tried out this implementation?  
Should I consider combining web services with some .NET Remoting (w/
delegates) to achieve this ability to notify clients of events?  And if I am
going there, should I just forget completely about a web service and consider
a completely .NET Remoting app? (I would like to avoid this as there are some
WS-Security based things I am doing that are rather convenient).  If others
have experience with this type of a web service, I would appreciate it if
they could share some of their thoughts on this.

Regards,
Ravi