Microsoft released its hosted streaming service (for free) :Silverlight Streaming

Microsoft is out with its proposal for hosted streaming service tat runs both on Windows and Mac :

Microsoft Silverlight Streaming by Windows Live is a companion service for Silverlight that makes it easier for developers and designers to deliver and scale rich media as part of their Silverlight applications. The service offers web designers and developers a free and convenient solution for hosting and streaming cross-platform, cross-browser media experiences and rich interactive applications that run on Windows™ and Mac.

The storage and delivery is free up to 4 GB,                         with outbound streaming up to DVD quality (700 Kbps).