[benz]

Really great idea to have a marketplace, but shouldn't the primary navigation be by type of functionality not by manufacturer?

I go to a marketplace primarily to find a tool to meet a current need (eg 'I need a Quickbooks Module', 'I need an iPhone Skin') not to browse through manufacturers.

There are times when I might remember that a certain manufacturer made a product, and I can't remember the product name - then I might add a filter by manufacturer - but its rarely my first approach as a purchaser of add ons. My primary task is to quickly find all offerings of a certain type, then to pick between them.