Macworld did a great job of giving us a live commentary of what the improvements would be for the new software.
Rather than repeat them all, here is the link to the commentary:
There will be additional announcements over the coming week, but they did manage to get some of the 15 features I wrote about.
- Turn by Turn direction capability
- push notifications
- Cut/Copy/Paste (YEAH!)
- landscape in all apps
- Spotlight now implemented
It seems the Beta is available for developers immediately Developer Center (NOTE: this was unavailable at the time of writing- possibly due to the update happening)
The software and upgrades will be available to consumers in the summer. It will be available for ALL iPhones and for $9.95 an upgrade for iPod Touch users as well.