Scheduled Emails, Shared Campaigns and Templates

I am setting up a ProSites network and would like to include an email marketing system with a couple of specific capabilities. I am wondering if any of these features are available in e-Newsletter and if not, do you think it would be possible to build it in? Here are the features:

- shared templates across multiple ProSites (update template once and it reflects in all sites)
- ability to pull website owner info dynamically into shared template, such as name and address.
- drip campaign emails (a series of emails that begins when the user signs up and continues for a year)
- shared drip campaign emails, again, with the ability to update the content in one place and have it reflect across all sites

Thanks!