They do seem to come around quite often. I signed up for email announcement to any seminars within a certain radius which seems to include the DFW area since I am down there fairly often, but I generally only go to ones in my local area. So far the information provided as varied in usefulness, but I like to see what is being put out in the general aviation world and also enjoy seeing who shows up to these events.
Recent seminars in my area include one on 'Stalls, Slow Flight, and Steep turns',
'What it means to be a good right-seater', and the 'Watch ATC work' posted above.