If your iPhone or iPhone 3G is jailbroken, you've more likely than not heard of the Installer app. But it looks like Installer 4 BETA has hit the web--albeit, a bit early according to developers. Because this is a BETA version of the app, there are more problems than normal, such as crashes and various bugs. However, the developers are confident none of these bugs will brick your iPhone, so just proceed with caution. 

Don't be surprised if not all of your apps show up yet, though. Remember: your apps need to be ported over to the new firmware before they will work. Just compatibility with the installer won't cut it. 

You can download the installer here or here.

[via Installer Apps]