There are certainly UI issues. However, I do believe there are precedents for open marketplaces that are not overrun by crap. The digital music businessed of iT

There are certainly UI issues. However, I do believe there are precedents for open marketplaces that are not overrun by crap. The digital music businessed of iTunes and Amazon do a good job of being open to any vendor while giving the most popular artists the most exposure to casual browsers.