Aperture 3 is out and packed with more than 200 new features such as:
- Full screen
- Metadata Pane Map
- Nondestructive Brushes
- Support for Pressure-Sensitive Tablets
- Feather Tool to blend adjustments more easily
- Multiple Instances of Adjustments
- Places with support for iPhone Photo GPS Locations
- Web publishing to Facebook, Flickr, MobileMe
- Video support
- Audio Support
- Enhanced Printing options
- Vanishing HUD and mother other UI improvements.
Read more here http://www.apple.com/aperture/features/
Trial version is still not available. As of today (Feb 10th) there is no email from Apple with the download URL.