Move Networks will officially announce tomorrow morning that Microsoft has joined its Series C round as a strategic investor. The $46 million round was unveiled last April and was led by Benchmark Capital. The two companies also recently announced that Move would be integrated with Microsoft's Silverlight media player. The curtain on this first example of their integration is going up momentarily as the companies have also announced they're powering the video feed from the Democratic convention at http://www.demconvention.com/.

With the convention video, Microsoft continues the momentum Silverlight generated during the just-wrapped up '08 Summer Olympics. Meanwhile Move burnishes its reputation for high-quality delivery gained through deals with ABC, Discovery, Fox and others. These two are natural partners.