The guys over samdroid have rooted Samsung Galaxy S running Android 2.1 successfully providing full access to its system files. The exploit provides a /system/bin/su from AOSP (that is, you can only use it from adb shell). Once you get the full root access to the file system of Galaxy S, you can modify the phone’s firmware and install third party apps, themes and custom ROMs.
Scheduled for release on July 21st (that was yesterday) the device is already jailbroken.
How to install LK2.xx
Your data or programs will not be deleted!!!!
1. Download: i9000_Kernel_LK9_01b9.7z
3. Flash with Odin3 as PDA file