Just a bit of hardware erotica on the Flip MinoHD: the red circle is the lens, which is being pulled off the CMOS chip (directly below). The 720P chip leaves individual pixels just 2.2 microns to capture their snippets.
And here's another neat shot—the Flip MinoHD's lens (top) next to a iPod nano 5th Generation camera assembly. Since size matters in imaging, it's no surprise that the nano isn't our favorite pocket cam out there. [ifixit]