I want to create a site that's connected to a weekly email newsletter. Of course I could do that through constant contact or a similar service, but it seems a shame to have two different systems -- one for logging in to WordPress (to comment, etc.) and another for signing up for an email newsletter.
It would be nice to be able to integrate the two, so that membership at the website includes the ability to post comments and receipt of the newsletter.
It would be even nicer to be able to integrate this with a store, so that the same login would control (1) commenting on the WordPress blog, (2) managing subscriptions to email newsletters, and (3) making purchases on an e-store.
Are there any plugins to do this sort of thing?
Any other suggestions?