iPhone SDK

Apple released the iPhone SDK today. They also announced some pretty awesome technology to be in the next update of the iPhone software. I am really excited about this. This means that we can start working on community developed apps in a central location that will auto update!This means I am going to teach myself cocoa so that I can develop apps. I do not think I will be doing really advanced apps, but I want to learn. So the question is does anyone know of any good sites to help me out?I really would like to see kismet, nmap, aircrack and metasploit ported over to the iPhone.