What is the Windows Azure Marketplace?
The Windows Azure Marketplace is an online marketplace for developers to share, find, buy and sell building block components, training, service templates, premium data sets and finished services/applications needed to build complete and compelling Windows Azure platform applications. Initially, the Windows Azure marketplace will have two separate landing environments: An Applications etc. section that includes finished applications, service templates and building block components; and a DataMarket section that contains premium data sets. In the future, Microsoft will combine both these marketplaces.