So far, pretty neat. Ran in to some trouble copying more advanced HTML, Apple’s announcement page worked well.
“On March 17, Apple presented the blueprint for iPhone OS 3.0, the next version of the world’s most advanced mobile platform. In addition to previewing its innovative features, Apple gave members of the iPhone Developer Program immediate access to the iPhone OS 3.0 software beta and an updated Software Development Kit (SDK) with over 1,000 completely new APIs.”
The announcement page is here (C&P’d, too): http://www.apple.com/iphone/preview-iphone-os/