So you finished your amazing new iPhone app, it scrolls like butter, now you need to show the world. You could make a screencast by clicking around in the iPhone Simulator, but that has a tendency to look like you just clicked around in the iPhone Simulator.
SimFinger itself is composed of two parts. One is a fake “frame” that sits ontop of the simulator. It adds some shine and gives it an iPhone 3G-look. Clicking anywhere on it will just click-through to whatever is below.
The other part is a little nub that follows around your cursor. It “indents” when you press down with your mouse, indicating what would be a “touch” on the phone.
The idea is to position iPhone Simulator below this facade and do a screencapture of just this area. You’ll need a good screencapture tool - I use (and recommend) Snapz Pro X.
SimFinger also provides an option to capture just some sub-region of your screen, and also allows you to not capture the mouse pointer ( you should use it if you dont want to ruin the illusion).