Posterous is really not too well known outside of tech circle. Even for people who know and use it, more will think of it as a blog rather than "email to blog".

Posterous is really not too well known outside of tech circle. Even for people who know and use it, more will think of it as a blog rather than "email to blog". To understand your product, people need to learn what is Posterous first. Its best to avoid such association in marketing.