Finding Org Service URL's

For an on-premise implementation of Dynamics CRM 2011 the following WCF Service endpoints are available:

Discovery Service Endpoint
http://{server}/XRMServices/2011/Discovery.svc

Organization Service Endpoint
http://{server}/{OrgName}/XRMServices/2011/Organization.svc (SOAP)

OData Service Endpoint
http://{server}/{OrgName}/XRMServices/2011/OrganizationData.svc (REST)

Deployment Service Endpoint
http://{server}/XRMDeployment/2011/Deployment.svc

The absolute URI for your on-premise services can be downloaded from the Developer Resources section in MS CRM: Click on Settings -> Customizations -> Developer Resources.

From here you can download the Service URL's for your organization.