Add "Chat" to post formats

There are no plans to add more post formats to this theme, but you could always try adding your own through a child theme if you’re comfortable jumping into the code.

Here are some resources to point you in the right direction:

http://codex.wordpress.org/Post_Formats#Adding_Post_Type_Support

http://www.elegantthemes.com/blog/tips-tricks/how-to-create-wordpress-post-formats