One of the things that still keeps me blogging on WordPress is that I have people who prefer to receive posts via Email. This has me wondering though if a service exists somewhere that would allow people to subscribe to get Emails when a post appears in an RSS feed? My thought is that I could link such a service to a MB category so that long-form posts could be Emailed out while smaller status or micro updates would not generate Emails as they would apear in a different feed. Curious if anyone has done anything like this?