Instead of importing the entire post, what about adding a function like the mailchimp to facebook integration.
So example would look something like:
Import from Mailchimp >
TITLE
<small paragraph with '... READ MORE' after X amount of words/characters>
<link to mailchimp archive page>
This way, there is no danger of the mailchimp campaign messing with pre-existing blog/template code.
Im my case, I have an set of mailchimp templates that differ from the blog/site template. If I were to import the mailchimp campaign exactly as it was sent into wordpress, it would easily break the layout of the site.
