Rip Dev, the Russian equivalent of our own Dev Team released a new tool called Pusher that installs Installer on your iPhone without jailbreaking it!
This is why we have developed a tool that does something else… and it’s absolutely amazing. Here’s what it does: it puts some tools (including our own Installer) onto the user partition of the phone without opening the system partition up! You get Installer, a whole world of third-party tools that didn’t got into the AppStore for some reason, such as Kate, Qik, Snapture, and dozens of others, all that without compromising your security or voiding the guarantee!
The tool is named Pusher (mostly because it pushes some things onto the iPhone, and because we found the allusion funny). It works for both 2G and 3G phones running 2.0.2, 2.1 and 2.2 firmwares. Simply download it, launch and follow the instructions on-screen – the whole process takes about 3 minutes.
I really like the idea but the main turn off is that since Pusher installs its tools on the user partition of your iphone, it leaves the main partition locked, which prevent the installation of important tools such as BSD Subsystem or SSH.
Pusher is only available for Mac OS X so far but a Windows version should be coming soon. You can learn more about Pusher from here, and download it here.
UPDATE: Here is what BigBoss has to say about Pusher:
Pusher is RiPDev’s 2.2 version of a jailbreak. This should be avoided and not used. Instead use the dev team’s jailbreaks. RiPDev’s version will block access to / partition and make it impossible to install Cydia. (They want you using Installer of course). It’s pretty much worthless since most the packages are in Cydia. The dev team’s jailbreak allows you to use both Cydia and Installer. There is no valid reason to use Pusher instead of one of the pwnages below.