What was the orginal post? I must have come in a little late, but the gist of it I guess is the keeping of bettas in community tanks.
And I will say just like everyone else, each tank is different, each betta is different, each situation is different, so the outcomes are all different.
The only experiences I have are those of my own from which I give advice from. If something has worked for me, I would recommend it to others. If something has not worked for me, I would recommend it only with caution. Who knows, it could very well work for someone else. But I can't write in stone that it possibly wouldn't.
As far as bettas, the only fish I personally have successfully kept with male bettas are cories and white cloud mountain minnows. I had a six gallon tank set up with two cories, five minnows, and a male betta that was doing wonderfully until the WC minnows croaked for an unknown reason (probably because I bought them on impulse from a not so reputable shop). The betta and the two cories are doing great. The betta doesn't bother the cories, the cories probably don't even know the betta is there. The betta would occassionally chase a minnow about if they flicked themselves in his face, but they were too fast for him to catch. They would also every so often nibble the betta's fins, I think they were teasing him, inviting him to chase because he would wip around so fast and then they'd all scatter. But WC are usually so docile they can't be bothered to be bullies.
Would I put that same betta in my 20 gallon community? Heck no. The black skirt tetras would probably shred his fins, the tiger barb definately would, and the betta and the gourami would go at each other big time. The filter is pretty powerful, and the tank is a pretty active, boisterous one with the danios zipping all over the surface. Not a good betta community IMO.
May it work for someone else, who knows, they'd have to be the ones to try it to find out.
~~Colesea