The website is http://jailbreakme.com. Before this new website was released, the only way that iPhone users could jailbreak a phone was for them to go through a very complicated process, which sometimes resulted in their phones becoming inoperable. Now, it is as simple as visiting Jailbreakme.com on your iPhone’s web browser.
Even though it is now legal to jailbreak your phone, Apple still is doing everything in it’s power to prevent users from doing so. If you do go ahead and use the service, and allow your phone to accept these 3rd party apps, your iPhone warranty will be voided. This creates concern over whether it is worth doing or not.
