The latest hot thing...
A "Reply All" mechanism for texting.
"Group chats are easy to arrange online through instant messaging services or social networking features such as Facebook Groups. But they don't work well on mobile devices, or if they do, they require a smartphone app and a decent cellular signal, which excludes lots of potential users. Steve Martocci and Jared Hecht, co-founders of New York-based GroupMe, frequently encountered communications problems while at concerts for their favorite act, the jam band Disco Biscuits. "No one's checking e-mail on their phone, the Internet connection doesn't work at the venue," says Martocci. "There's no good way to stay in touch in real time with a group."
GroupMe and its ilk are designed to work for anyone, on any phone."