The Windows Home Server Power Pack 1 RTM was released and is currently available in English version only. The product will soon be available in 4 new language options for a total of 8 localized builds. There is no reason to wait for the new media release of Windows Home Server - if you buy it today, the Power Pack 1 update is free and will be applied via a Windows Update. One small point of trivia, with the initial release of Windows Home Server, the first copy was purchased in New Zealand, as they have a very streamlined manufacturing process in that part of the world.
More info: WHS PP1