post about it today. Specifically, "we chose the term 'market' rather than 'store' because we feel that developers should have an open and unobstructed environment to make their content available."
Apparently, there will be no approval process for applications, in contrast to Apple's more rigorous selection process. Android says that in "three simple steps," a third party developer can "register as a merchant, upload and describe your content and publish it."
The big implication here is that Google's manufacturing and carrier partners are okay with this concept -- since they'll be the ones running Market on their devices and networks.
Apple has deleted apps that it considers detrimental to the interests of its users, including the thousand-dollar I Am Rich app, that was just a picture of a tacky, neon-red diamond.
some sort of acceptable use policy for developers.
Interestingly, Android is calling apps "content." Android's software does allow for the distribution of ringtones, music, skins and other content, not just apps. So we'll see non-app content in the market? The service will also include a rating system, and Android plans to include a developer dashboard and analytics software (Google Analytics?) to help developers understand how their apps are doing.
Android Market will be in beta on early devices, and it will at least support free applications; a post-launch update will provide support for paid version (this presumably means a payment system -- Google Checkout?), support for multiple versions of an app, support for multiple devices, the analytics software, and more.