It would really help if I was able to write to the Opportunity as well as the Contact page. There are a number of fields that are unique to out Opportunitiy pages that I am unable to include in my Marketo work flow.
In this specific instance we send a survey out when an opportunity closes. I would like the date the survey was sent and filled out to reside on the opportunity rather than the contact as they can have multiple surveys. Since the trigger is the opportunity rather than the contact Marketo should be able to identify the proper opportunity to write to.
I can envision other use cases but this is the one I'm working on at the moment.