Build a podcasting membership site

I want to setup a podcasting site,with limited free access material and all the rest as paid membership. I have a site in mind which is similar in structure. I want it useable by iPhone,and there may be flv videos. I guess there would be a main page and description of the site and how to use it.- possible by video on this page. There would be downloadable material which is free and others for the members. Each podcast would consist of 4 parts - and would have an accompanying photo,and all the podcasts would need to be indexable either by name or alphabetical order. ## Deliverables This will be a bilingual site,and I can deal with english only for setting this up - I can give you the other language but you don't have to know anything about it to use it.