Joe Hewitt: After I had my iPhone for about six months, I started to feel like I shouldn't need a PC anymore. I should be able to do just about anything on an iPhone that I can do on the desktop. There's so much stuff that is actually better on the small screen because it requires designers to focus on what's really important. I've changed my original opinion that this is a companion device to now thinking that this is the device people should use to start new projects or new companies: develop for this touchscreen experience first and the desktop web second. I think that's where we're headed. So many things work better on a hand-held touchscreen that's with you all the time. We shouldn't think about iPhone apps as lite versions.
For the first version of the Facebook app, I had time to build only the most important features. That was the beginning of the App Store, and none of us knew what user expectations would be. Turns out they were extremely high. I assumed people would be satisfied with a companion app to the website with a limited feature set, and I was really wrong about that. For Facebook, people expected every feature that they had on their desktops. And now I tend to agree with them.