Let me say it again: "Gotta Love the iPhone 4 HD Video Recording"!
I bought the phone, despite having a iPhone 3G, because I want the HD video recording feature. And the reason is to capture all the cute and funny little sen antics. And I have no regrets! Aside from having a high def video capture and playback and therefore very good quality video, the iPhone 4 has the ability to capture video in WIDESCREEN! Yup, tilting the phone side ways capture the video in widesreen. And that means, watching little sen's antics in a Cinema! Seriously, you have to see it to appreciate the video quality. It's like watching Lord of The Rings in GSC!
This, alone, is worth the $$$ and these memories are priceless!