I'd be interested to hear how you all have used/integrated Marketo's social capabilities (both the built in capabilities that everyone has access to and the add-on modules/analytics) on your non-Marketo landing pages. Almost all of our campaigns are centered around our website - where we have the Munchkin code on every page and iframe Marketo forms into the pages. The only time we build Marketo landing pages is for event registration pages.
For example, we'd like to leverage the "social influence" reports. But something tells me this is only available if we use Marketo landing pages (and not, for example, a third-party tool like AddThis (even though we have the Munchkin code on the page).