Hi All,
below is a small graphical suggestion which shows different ad formats in FB.
The main problem in that FB very recently had many changes in design, due to this the display of ad in various device is not consistent. we know some ad formats like "suggested post" "side bar ads" are common but still we haven't seen many in FB or the way of presentation.
Also note the roll out of new design is still not complete, we are in discussion with PG about some creative ideas. Will get on this very soon.