We have a Julia and iJulia app on https://koding.com. It's going to be used by Harvard & MIT students soon. It's public and everyone can try it by simple login to Koding. The best part is you can easily try it online, without installing anything. Here is an screenshot of how it's look like (iJulia and Julia inside Terminal):
The source of this app can be found here:
https://github.com/gokmen/julia.kdapp
I'm happy to answer any questions :)