Here is a hack to update your Samsung Galaxy S (i9000). It wont work for North American versions (Captivate, Vibrant, etc.). With this tutorial you can update your Galaxy S from 2.1 to 2.2 Froyo. The videos in the post become a great guide for new Android users as well as people looking for a quick transform.
This tutorial will show you how to root your phone, get into recovery mode, get into download mode, flash the JPC 2.2 beta firmware as well as install a lag fix which will definitely boost the performance of your Android device.
Follow these videos, to get a simple and quick customization guide.
feel free to share if there are any more ways available, we will definitely look into covering them on Wow Techy!.