Steve just ran through a bunch of features of iPhone 2.0, and while we saw most of them back in March, some of them were new, like being able to draw in Chinese characters. There's also new support for iWork documents and better Office doc support, as well as new abilities to save images from email to the photo library, and new contact search functions. There's also finally bulk delete and edit of email / SMS, and the App Store will be making it to 62 countries, up from 22 in March.
Looking through the gallery now live on Apple's site, there are some other changes as well: the Maps app now has a slightly different "peel back" icon, there's a new 3G icon (obviously), and the calendar app has been redesigned, probably to work better with MobileMe.
Firmware 2.0 will hit in July free for iPhone owners (we'd say July 11, when the 3G iPhone launches, is a good bet) and the price has dropped to $9.95 for iPod touch owners -- still high, but better than the $19.95 we heard in March.