Microsoft Expression Encoder 4 offers the ability to inexpensively adaptively distribute to Apple iDevices, and does so admirably ...

Version four also includes a new H.264 encoder. Three different packages will be available: Expression Studio 4 Ultimate, Expression Studio 4 Premium, and Expression Studio 4 Web Professional.

Microsoft Expression Studio 4 Web Professional: For Web design professionals. Expression Web with SuperPreview, Expression Encoder and Expression Design.

Microsoft Expression Encoder is a free download for Windows systems only. Microsoft Expression Encoder 4 [Microsoft via Digital Inspiration] ...

A new version of Encoder, called Expression Encoder Pro 4, enhances publishing of video to Microsoft’s Silverlight rich Internet plug-in platform and backs the latest H.264 video codec ...

Note the Expression Encoder screencap file format isn't meant for distribution or storage really, but as source to encode to a WMV or MP4.