Advantages:
This is way to organize presentations and courses very inexpensively:
one need not travel to other locations.
A Web forum tends to encourage shy students.
Disadvantages:
One needs more time to prepare & rehearse a presentation which
will include being familiar with all technical resources and needed controls.
One also needs time to organize, scheduling and reserving facilities and
technical support at both the local and the far sites.
A Web forum may frustrate talkative students.