With RadioDJ you have a couple of options when it comes to streaming.
You can either use a Plugin or you can use a standalone piece of encoding software.
Here are just some of the encoding programs available.
1) MB Recaster (4 free encoders) M B Recaster
2) BUTT (Free) BUTT
3) Edcast standalone Edcast
4) RadioCaster ($49.95) (Shoutcast v1 v2 & Icecast) RadioCaster