Robert,
We use it for determining exclusion/safety zones for incidents, areas of exploitation for certain pieces of equipment etc... I can't really go into to much detail on this forum.
I have implemented what I need to do using the advanced draw tool (today), as this widget allows you to create buffers on all types of geometry. I just thought this would be a useful addition to your buffer point widget creating as you say a general buffer widget.
I'm sure other people will find a general buffer widget useful. Like I say no rush as I have implemented this through another widget but if you do fancy upgrading I will certainly use it.
Regards
Anthony