The star exploit is a little shaky, since it might crash. My iPad had 3.2 on it with shsh blobs, so I just updated it to try out star by curiosity. It will say that it crashed if you go to the url after jailbreaking, do not listen to that warning if you get cydia on your springboard anyway. Because if you install the "essential" updates in cydia and jailbreak again using star, it will mess up cydia.
Also, the exploit uses a font error when loading a pdf file to work. Other hackers may use that exploit to gain access to your personal info, so comex released the "pdf loading warner" in cydia to warn you when a pdf gets loaded. With this new exploit out, everyone should install this.