I don't know what your definition of collaboration is but I'm looking forward to some of the SharePoint Conference sessions that are being presented by customers.
(Seems to fly in the face of some analysts who say SharePoint can't do this ;-)

Del Monte Foods: Collaboration and Social Networking in the Enterprise

Presented By: Jonathan Wynn- Del Monte Foods

The concept of social networking has recently experienced a great deal of visibility and success with the public sites like Facebook, MySpace, and Linked in. The ultimate goal of social networking within an organization is to enhance communication and collaboration, and bring about productivity increases in the day-to-day challenges of a mobile workforce and a globally dispersed company. The challenges the Enterprise faces for adopting Social Networking tools has been an increasingly difficult task—learn how Del Monte Foods successfully deployed Collaboration and Social Networking in the Enterprise with the deployment of Microsoft Office SharePoint Server 2007 and the out-of-the-box features.

Ford: Roadmap and Business Models for Adopting SharePoint as Your Collaboration Tool

Presented By: Kevin Tracy; Christine Gelletly- Ford

This session outlines a successful roadmap and business model which companies can use to adopt SharePoint as their strategic collaboration tool. Working with Microsoft, Ford Motor Company deployed Windows SharePoint Services 2.0 to provide a common platform to consolidate multiple islands of collaboration tools. In 2007, Ford continued with the deployment of this platform by upgrading to Windows SharePoint Services 3.0. The advanced features of Windows SharePoint Services 3.0 accelerated adoption as SharePoint quickly became the shared workspace of choice at Ford Motor Company. As adoption increased, Ford Motor Company faced additional challenges by application teams wishing to customize the SharePoint platform. This session provides a high level overview of Ford Motor Company's collaboration strategy and how SharePoint fits into this strategy. A re-useable blueprint for bringing SharePoint into your organization, building a sustainable business model, and developing ways to drive adoption are covered. This session also addresses operations, managing customizations, and governance. The end result for Ford Motor Company was a shared workspace service offering that required very little investment. The savings from this service offering are being reinvested into Microsoft Office SharePoint Server 2007 to further reduce the number of products that are deployed for collaboration at Ford Motor Company.

Skanska: The Collaboration Platform for Our Business

Presented By: Allen Emerick- Skanska

Skanska USA Building Inc is one of the leading providers of construction management services in the U.S. With annual revenues exceeding $3.7B (USD), Skanska manages complex projects with unique challenges and demands. Skanska's success depends upon effective information management, communication, and collaboration across thousands of people, from clients, architects, and engineers to subcontractors and consultants. In this session, learn how SharePoint has improved how they communicate and collaborate, better enabling everyone on the project to 'be on the same page'. Skanska outlines their unique business challenges, their SharePoint strategy, architecture, and a live demonstration of their environment. Skanska's IT group consistently ranks as one of the top IT firms in the U.S.; you'll learn some great information in this session.