Install redis-cli.
bash <(curl -s https://raw.github.com/boourns/intercom/master/install.sh)
set INTERCOM_REDIS_CONFIG in your ~/.bash_profile (ask around for credentials).
get a free redis instance via http://redistogo.com/ if you want to start your own intercom.
An example INTERCOM_REDIS_CONFIG would be -h server.redistogo.com -p <port> -a <just the password, no username>
Get many nodes around the office / world to run ./intercom.sh &
To broadcast a message, use:
redis-cli $INTERCOM_REDIS_CONFIG set intercom-message "hello, world"
Integrate intercom into your apps by writing messages to intercom-message