I don’t know which section you are talking about but they use our Calendar bean.
Basically, using our calendar or not this is all about events but AdBlocks can probably tell you better…
Are you really asking about smart client because in that case the answer is yes you can use it all (the demo is done in a smart client). When you are asking for web client the answer depends on which elements you want to use. The Calendar bean does not yet work in a web client.