What are the affordances found in emails and blogs?

Email

Affordances - Directed messaging service. Aims to inform and inquire about specific subject or detail

Strengths - Known audience contained to those on the distribution list.
Ability to communicate one to one or one to many. Feedback on email delivery and trackable read notices. Send attachments and hyperlinks

Shortcomings - Size and type of attachments may be limited via firewalls

Blogs

Affordances - General distribution of thoughts and feelings. Aims to engage others with own personal reflections

Strengths - Private viewing but this does not afford feedback. Limited viewing where blogger seeks comments and feedback within a known group. Open to public view to reach a much larger audience. Can host variety of media ie podcasts, video clips and document downloads.

Shortcomings - Your audience is unknown unless they post a comment.
Little feedback to the blogger on who reads the blog posts

The affordances of both asynchronous technologies are dependent on how different users engage with the medium. For example some managers may use email as a primary method to communicate and delegate work to their staff to avoid face-to-face confrontation. Others might use email to back up a telephone conversation to ensure they maintain an audit trail of information being communicated or requested. Do bloggers write for themselves or are they seeking feedback from other?