Of the 1,500 or so new developer APIs and over 100 new user features mentioned by Steve and Co. yesterday, only a handful were covered in any detail. As usual, Apple was careful not to reveal anything about the next generation iPhone hardware expected to launch this summer. Fortunately we can spelunk the iPhone OS 4 SDK developer preview for hints of what's to come. TUAW found a new "iChatAgent" process running on OS 4 devices -- purpose, unknown -- but surely an indicator that Apple's finally set to launch a mobile iChat app. The fact that Apple hasn't already is one of those great iPhone / iPad / iPod touch mysteries. We've also peeled back
