Venting...
SoapExtensions suck!!!!
If you've ever worked with Remoting and you've done ChannelSinks or MessageSinks then never mess with SoapExtensions; you will rip your hair out...
The Remoting guys made extensibility elegant; the WebServices guys made extensibility painfull!!!
Update: After a nights sleep, I'm a little more rational. Maybe they don't outright suck, but I'd still rather create server-side sinks in Remoting...
[Listening to: Man Should Surrender - Pailhead - (4:42)]