Community communication is primarily through an email list hosted on Yahoo! Groups.

This group is for residents of the neighborhood only over the age of 18. No minors are allowed as the group is unmoderated. 

To sign up for the group and request membership with a valid yahoo ID.

• Find the group: http://groups.yahoo.com/group/sennahillsaustin/
• Create Yahoo ID (note - a Yahoo ID doesn't have to be a Yahoo email address) and request membership and wait for moderator to approve. Be SURE to include your full name and address when making the request.
• You should receive a welcome message although it may get caught in you spam filter

Complete details are available on the group page at the link above.