As always I'm probably the last to know but in case not the case then check out www.windowscommunication.net!!
Two things I stumbled across that may save you time
Firstly, the service binding and contract section of your config file prior to the Jan and Feb CTPs you'd define
now you specify
<system.serviceModel> <services> <service name=
You'll get Intellisense errors but it works!!
Secondly, when referencing the name of the service you previously stated the full "namespace.class.method,assembly name" again from Jan/Feb onwards don't include the ",assembly name" as it's changed and you'll get an obscure error message!!
But use the updated Hands on Labs docs and you'll avoid these issues!!
More great resources at http://msdn.microsoft.com/winfx/technologies/communication/default.aspx
and the Introduction to Building Windows Communication Foundation Services is a great primer!!