once your server is up and running and people can connect then you can give your details out for other djs to use your server.
make sure you have the bandwidth for your listeners
your amount of listeners is dependant on your upstream.
do a speed test here http://www.speedtest.net
and this is the calculation here to see what you can handle.
upload / bitrate = max users.
using a streamhost will give everyone (eg the listeners and the dj's) a central location to connect to without reying on your pc being online.
for a list of reviewed hosts