Well, I listed what I knew was pretty good, but you did not really respond to it and since most others did not either, I figured we were all pretty much in agreement.
The reason why you would most likely get more hits on arm stuff say, (on any site) is because they are just an all out much more popular showy bodypart, that pumps up easy, lets the lifter feel some weight in the hands and thus feel strong and most guys find arms quite responsive and love to train them.
Ab work is not a big favorite among the reg gym goers and, even though some of the big compound lifts hit the mid section (at least statically to strengthen, as PL'ers are not big direct ab work fans either) abs are not high on the list of "pumper" feel good exercises or impressive lift numbers etc.
Along with direct ab work to really show up well, the diet has to be quite strict and dialed way in, as you cannot carry much fat in order for the hard work to show.
I will be one to admit, ab work for me, is boring and not fun to do. I do it on occasion, but less than I should.