How can I Connect my sony DCS-W300 to my computer and use it as a web cam for MSN messenger?

Does the camera have a USB or Firewire connection? Use either of those. Then your camera should appear as a source for MSN Msgr video.

So anybody get this thang to work?

Does the camera have a USB or Firewire connection? Use either of those. Then your camera should appear as a source for MSN Msgr video.

Emphasis on the word "then". It can only appear as a source AFTER you connect the camera. Some cameras have a setting/switch on them for WebCam use.