The part missing about the post above regarding rc:Toolbar=false is that it is using a standard SSRS reports and report viewer (not the CRM Report Viewer). It's a fiddly process, but here are the steps:
Publish Report for External Use (note you will have to setup the report to RunAs a windows account - see step 3)
Find the published report on your SSRS server - SSRSReportServer/Reports (look for the folder "MyOrg_MSCRM")
Find the MSCRM_DataSource in the folder and change it to run with "Credentials stored securely in the report server" (a CRM User's windows account that has permission to access the CRM database - see example connection string below)
Run the Report and copy the URL: SSRSReportServer/.../Report.aspx
Reconstruct the URL using the SSRS Report Viewer (Note, I'm passing a report param called "LastName"): SSRSReportServer/.../ReportViewer.aspx
Sample SSRS Connection String:
Workstation ID=NewCRMServer.Microsoft.Crm.Setup.Server;Data Source=MySQLServer01;Initial Catalog=MyOrg_MSCRM;Connection Timeout=60;Integrated Security=SSPI
