http://itunes.apple.com/us/app/final-cut-pro/id424389933?mt=12&ign-mpt=uo%3D4
What's New in Version 10.0.1
This update improves overall stability and performance and adds the following features:
• Export audio and video stems as a single multitrack QuickTime movie or as separate files using Roles.
• Import and export XML to support third-party workflows.
• Place Projects and Events on Xsan to improve collaboration between editors.
• Set custom starting timecode for your projects.
• Add transitions to connected clips in a single step.
• Enable full-screen view in OS X Lion.
• Speed up delivery with GPU-accelerated export.
This update is recommended for all users of Final Cut Pro X
