Are you lacking a webcam on your laptop?  Want to be able to use your Android mobile device as a substitute? Why not try out Droidcam, an app brought to our attention by XDA forum member d3a.

Droidcam works over WiFi and streams your phone's camera output to your computer. The desktop module should work with most chat applications.

You'll need to download the Android app and install the desktop client (available for both Windows and Linux). Make sure the tests on your devices camera pass though otherwise you may experience force closes when connecting.

Droidcam is available to download free from the Market. Head on over to the forum thread for user feedback and a link to the devs' website.