Whether it is a sport event, or a product presentation, you may want to post in real-time what is happening.
If you are a web publisher and you need a tool to publish live on the web, you should check out Dilmot. With this publishing tool, you can create “streams” of real-time chat, that, besides being published live without the need of refreshing the content, can be easily embedded into your website. And the content of the chat (Q&A) will remain published and improve the SEO of your website.
There are other options to make live events such as Qstion (http://www.qstion.com), our sister company. In this case, the live chat is done together with a video broadcast. You may use Google Hangouts video platform, which is well integrated with Qstion.