Vizioncore is planning to release a version of its vFoglight management tool to operate with Microsoft's Hyper-V virtualization platform by the middle of the year.  And then, the company plans to add in support for managing Citrix XenServer by the end of the year.  This news comes from NetworkWorld magazine while at the Cebit conference.  The article states:

At last year's Cebit, attendees only wanted to talk about VMware's products, but that has changed this year, according to Lothar Esser, channel manager at Vizioncore. That means there is also more demand for management tools for Hyper-V and Xen, he said.

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Management has become more important as companies virtualize more of their systems, Esser said. One challenge is to track the movement of virtual machines. Features such as VMware's VMotion have made it easy to move virtual machines, but if they can't be located quickly, that can affect uptime negatively, Esser said.