I have the same issue discussed in this thread. The main functionality I am looking for is a way for a provider to link to my store and have only that provider's items listed. I have found it quite easy to, for example, make a link where only products in a certain category are available (e.g.
http://www.mydomain.com/store/home.php?cat=131) and that looks great, with a nice description and "Buy Now" button. Now if there were just a nice link like this:
http://www.mydomain.com/store/home.php?provider=1543
Anyone!!! I would think this is a major feature a lot of people would appreciate and use. I'm sure providers want to link to the store and not risk easily showing potential customers their competitors' products and such.