In a follow up to my previous post about how to use a sript task in SSIS to call SSRS reports.  Here is a way to quickly identify what SQL Job is associated with a certain report.

SELECT     [ReportServer].dbo.Catalog.Name, [ReportServer].dbo.Schedule.ScheduleID, [ReportServer].dbo.Schedule.StartDate
FROM         [ReportServer].dbo.Catalog INNER JOIN
                      [ReportServer].dbo.ReportSchedule ON [ReportServer].dbo.Catalog.ItemID = [ReportServer].dbo.ReportSchedule.ReportID INNER JOIN
                      [ReportServer].dbo.Schedule ON [ReportServer].dbo.ReportSchedule.ScheduleID = [ReportServer].dbo.Schedule.ScheduleID
WHERE Catalog.Name like '%'+ db_Name()+'%'
ORDER BY Catalog.Name

Just run this query against the database that contains the subscription and all of the reports in that db will be listed with their GUIDS. 