MarketPress with Vendors & Resellers

Hi all,

I'm relatively familiar with using marketpress on non-global basis, but have an Idea that I'd like input on accomplishing perhaps using and extending some global functions.

I would like vendors to be able to sign-up for a site that they would be able to sell their own products - nothing out of the ordinary... but then I would like to allow a re-seller to sign-up for a site that would have access to any of the vendors products to sell on their own reseller site. The reseller would also be able to sell their own products.

Basically, I just want sites to share products and have a true vendor / reseller relationship.

Let me know if anyone is attempting this or development is taking place?