There is a cool WCF feature instroduced in dev10 called configless activation. You don't have to have a *.svc file in your web directory, instead you can activate a WCF service using the following configuration element:

<system.serviceModel>

  <serviceHostingEnvironment>

    <serviceActivations>

     <add relativeAddress="Service1.svc" service="configlessWCF.Service1"/>

    </serviceActivations>

  </serviceHostingEnvironment>

</system.serviceModel>

Hope this helps.