Windows/Mac/Linux: Open-source, Mozilla-powered media player Songbird just released their first beta of their newest release, adding official Windows 7 support, video playback, and support for syncing to devices that use SD cards for storage.
For Windows 7 users, Songbird officially works as intended on the platform. There are no Windows 7-specific features included in this release, but those will be determined at a later date, presumably when it exits beta.
Songbird has also re-introduced support for videos. Songbird will only import videos that it has codec support for. Codec support is limited to OGV, WMV, MP4, M4V, and MOV formats, depending on your platform and what programs you have installed. Support for the popular AVI format is, unfortunately, not currently available.
Perhaps the best feature addition is Songbird’s support for syncing to devices with removable storage. This feature has been tested on select devices, such as the Motorola Droid, HTC Hero, and the Palm Pre. The Songbird 1.7 beta is free and available for Windows, Mac, and Linux platforms.
Songbird 1.7 b1 available for download [Songbird Blog]