Originally developed for my site:
Ustream is a great free live casting service. Anybody can become a broadcaster. However it's always hard to reach out to the audience.
If you can show visitors that you are live on Ustream, it could increase your viewership. So I made this simple add-on using Ustream API call. The source code was tuned by Yamanoi.
This is a free add-on with not so much of the support. If you would like to see more functionality, please drop a line. I will consider making them.
This add-on comes with Japanese language file
When you use this add-on, I highly recommend to ENABLE FULL PAGE CACHE!!! Or Ustream may block the status check from your website.
This is very basic add-on. If you understand concrete5's custom templates, and HTML, you can change the image easily.
This add-on is on GitHub: https://github.com/katzueno/UstreamStatus-concrete5
Also check my other addon, "Twitcasting Live Status" It does the same thing for Twitcasting.