Aplication like flashden

hi im looking for a tutorial to creat an web application like
flashden.net, where usere can register and sale files or other things.
I think this application is a combine of a community and a shop
beacuse every user have a own Profile with one picture and som
description. so i work with ruby 1.8.6 and rails 2.1.0.
if somebody have helpful tutorials for me please tell me the link i
prefer tutorials in german.


why nobody answers???