N73 as Webcam
There is a nice application which turns your N73 as a good quality web cam. As it works by bluetooth what you’ll get is a wireless web cam (your PC should have a bluetooth dongle. If you using a laptop bought recently, 99% chance is it will have bluetooth support built in.) You can also find a USB version. The application can use either the front camera or the normal one in the rear side. The application have two parts. One is to be installed on the PC and the other on the phone. You can refer the help provided in the application for configuration settings.
In my case installation was easy and the video quality was better than an average web cam. I tried it using Yahoo. You can also create videos for youtube or other video sharing sites.
The biggest downside is it is not free :(. You can the try the software for 7 days with some limitation. Then you need to purchase it. Unfortunately the price is a little high. At $20 you can easily buy a good normal webcam. But for technology enthusiasts it is a cool application.
For details: http://www.warelex.com/products/webcam/