SMS or txt msg to a group is useful in sending "one text message" from your cell phone to a "network of family and friends"
Some programs I am figuring will allow different levels for example
moderated or unmoderated - password protected or open to public -
This info could be a useful tool in communicating to a group for example ...at a protest or-and-with those that are not present (at an event or protest) with text message updates and group notices, as in requests for needs and related messages of emergency or not ...all by cell phone / email <and free>
Looking for information or recommendations here on PIMC
"to be using technology to communicate as a community for the common good of humanity"