In all versions of Mac OS X previous to 10.6, when you plugged a camera or iPhone in, it would launch iPhoto or Aperture or whatever program you’d set up as your default. Pretty inconvenient if your brother in law plugs his iPhone into your iMac to charge, thus launching iPhoto about four times a day.

Image Capture 6.0, in 10.6 takes care of this with a little preference portion in the lower left corner of the app. For each camera or iPhone (or, presumably, other camera phones, but why would you buy one of those?), you can set a preference as to which program, if any, will launch when that device is plugged in.