RiP Dev have came out with a very interesting piece of software that puts Installer.app on your iPhone 2g or 3g without having to go through the jailbreaking process. It works on 2.0, 2.1 and 2.2.
Here are all the features,
Gain access to hundreds of tools that are not available in App Store for some reason and that allow you to expand the functionality of the iPhone, including our own Kate, Qik, Snapture and many others!
While giving access to Installer.app, Pusher is not opening the system partition of your iPhone for writing. This makes it more secure and prevents potential information theft that can be fairly easy with the “normal” jailbreak methods.
Gain the ability to set the SpringBoard background — completely free!
Works for 2G and 3G
Pusher works for both 2G and 3G iPhones.
Support for 2.2
In addition to newly released 2.2 firmware support, Pusher will work just as well for 2.0.2 and 2.1 iPhones! However, we recommend you to stay on the bleeding edge and give 2.2 a try – it represents many hours of hard work of Apple engineers.
It is only on MACS at the moment but will be coming out on Windows soon.It is now out for both (WINDOWS DOWNLOAD BELOW). To read more about it CLICK ME.
Via RiP Dev: Pusher