If you are using Evocam on OSX for a webcam, you can change the Built-in Web Server setting
Display stream using: Server Push
This allows the live web video feed to be accessed via Safari on an iPod Touch or iPhone. Using the Java Applet works just fine on desktop browsers, but due to the lack of iPhone Java support, you have to go this route. Very slick. We use Evocam with an old iSight camera to check in on the dog from time to time and it is great to be able to do this via the iPhone. Evocam is the best webcam product out there on the Mac (nothing even comes close) and very much worth the license charge.