The up gradation on iphone OS is always a worry for guys who jail broke their iphones, but no worry guys the OS 3.0.1 can be easily jail broken as you did it for OS3.0.
The iPhone Dev Team put up a post detailing instructions on how to use the current versions of redsn0w and ultrasn0w on 3.0.1, and it’s pretty easy: Jailbreaking with redsn0w only requires you select the IPSW file for OS 3.0, and then you can use Cydia to install ultrasn0w and everything will be perfect in the land of semi-approved iPhone tinkering. Phew! [iPhone Dev Blog]
Fraz is a creative head at Website Impressions, fraz loves to design and browse internet and blogging about upcoming gadgets and internet technology 
