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The Application Service Provider (ASP) model is a widely adopted business model for communities of buyers and sellers to conduct commerce over the Internet in a virtually integrated environment. However, there are limitations imposed by the ASP model. This paper discusses how an alternative combination of peer-to-peer and web services technologies can provide a suitable, low-cost IT infrastructure that could potentially overcome these limitations and enable trading partners in a community to achieve virtual integration. Such an alternative infrastructure would allow trading partners to improve upon their resource utilisation for IT and, instead, focus on their core businesses, discover new business opportunities and form new partnerships dynamically as and when needed, in a loosely-coupled manner.