If you’ve been waiting for CWM3, wait no longer. XDA forum members Krylon360 and drhonk have posted their public beta for the SGS4G.
Currently, there are issues with /system mounts, although the device does not unmount to be able to format during a restore. What currently works include: Backup, Advanced Restore of Data and Cache, Flashing zips, Error reporting.
You’ll need to use Root Explorer, Android Commander, and Droid Explorer to replace the recovery binary in /system/bin with the one posted in the thread. This will allow you to flash the update.zip from stock recovery. After the file is replaced, you’ll need to reboot the device.
For more information and to download the files, head on over to the forum thread._________