It takes a while for the Dev team to jailbreak the iPhone 4.  However, the wait is worthwhile.  You can easily jailbreak your iPhone 4 easily by launching your Safari browser in your iPhone 4 and go to this site: http://www.jailbreakme.com. Why jailbreak you iPhone?  If you want to install softwares and enhancements that are not allowed into Appstore, this is the solution.  We can have things like previewing your SMS and Emails in the [...]

Have got your iPhone 4 and wanting to install anything that is not allowed in App Store? The hackers had worked hard and they are ready to bring you a preliminary jailbreak for iPhone 4.  The only thing now is the freedom to install applications on the userland.  Nothing can be done at the system level yet. However, I think the day is not far.