I know this is difficult considering you are two different systems. However, it would be great if there was better connectivity between SFDC and Marketo. Specifically, I have people creating campaigns within SFDC then creating the same one within Marketo which creates duplicate campaigns. If we could get some sort of notification that a campaign name like that already exhists or somehow prevent the duplicates from being created, it would make my life and my SFDC administrator's life much easier.