Just use the following code to insert MageBuzz Events extension in to a custom block. This can come in handy if you want the calendar to be in a category page for the purpose of going in to the main navigation. The information was not found anywhere on their website but they provided it to me when I asked for it.

{{block type="events/custom_events" name="events" template="events/custom-events.phtml"}}

Enjoy!