A lot of people have speculated that Citrix and Microsoft would be at odds over the acquisition of Softricity SoftGrid as it seemed to pit the two partners against each other over application virtualization. However, working in conjunction with Microsoft, Citrix has just posted a new blog entry which outlines how the two products continue to interoperate, bringing the best of both solutions together to maximize the customer management experience.
Microsoft also has a KB article and white paper on integrations between the two solutions:
KB931576 - How to publish a SoftGrid-enabled application in Citrix MetaFrame (http://support.microsoft.com/kb/931576)
Best Practices for Integrating Microsoft® SoftGrid® Application Virtualization with Terminal Services and Citrix® Presentation Server®:
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