try
www.lapbandtalk.com tis a mostly American forum
or
WLS information and Support - Home a UK based charity with lots of information and links and lively forum that discusses ALL Weight loss surgeries and lots of info and advice on choosing a surgeon, getting NHS surgery and Going abroad for gastric banding. it's free to have a look round but if you want to post it costs £15 for the year which helps fund the website, local support groups and information and support for existing/ prospective patients.
Also if you google BOSPA you will find another website with lots of info.
I hope that this helps you a little with your quest for knowledge.