If you are stuck with an iPhone 3GS having newer bootrom (iBoot v 359.3.2) and want it to be jailbreaked here is some great news for you - iH8sn0w Sn0wBreeze utility will soon be upgraded to support tethered jailbreak (meaning you will have to re-jailbreak if your iPhone reboots) of iPhone 3GS having iBoot v 359.3.2. The only catch is that you must have your iOS 3.1.2 ECID saved as you will need to downgrade for this to work.
If you are owner of an iPhone 3GS and still scratching your head whether your device is jail-breakable or not because of the old bootrom requirement by both redsn0w and Sn0wBreeze here is a simple tool which will tell you whether your iPhone 3GS has the newer bootrom (which is sadly not jailbreakable yet) or the older which can be exploited by redsn0w or sn0wbreeze.
iDetector is a simple and small utility by iH8sn0w which will provide you the answer telling whether your iPhone 3GS has an old bootrom or the new bootrom, to get it working all you need to do is to put your device in DFU mode and click the button 'Is my Bootrom Old or New ?' and you will have the straightforward answer.
Ultrasn0w 0.92 Update Fixes Missing Carrier Name Bug On iPhone's With Firmware 3.1.x With 04.26 BasebandSubmitted by admin on Tue, 11/10/2009 - 05:14
iPhone Dev Team's carrier unlock Ultrasn0w is now updated to v 0.92 fixing the cosmetic missing carrier name bug on devices with firmware 3.1.X having baseband 04.26, to install the latest Ultrasn0w update make sure your iPhone is connected to internet and launch Cydia, it will display the new update from where you can install it.
While iPhone lovers were disappointed that the latest unlock from iPhone Dev Team UltraSn0w does not support unlocking the new Apple iPhone 3G S, a good news is here - the author of the original iPhone unlock exploit and Bootloader 4.6 cracker "GeoHot" has made significant progress towards exploiting the new iPhone 3G S bootloader bypassing the sigchecks which could potentially result in an iPhone 3G S jailbreak and unlock, the exploit dubbed Prurplera1n seems to allow inserting of custom commands into iBoot which can be exploited further for achieving the jailbreak and unlock.
Jailbreak and carrier unlock for latest Apple iPhone 3G S seems to be here, the famous iPhone Dev Team has now released an video demo displaying successful carrier unlocking on official 3.0 firmware which means it should be able to unlock iPhone 3G S which comes pre-loaded with same operating-system version, the DevTeam has decided not to reveal the exploit named UltraSn0w until iPhone 3G S finally hits the stores tomorrow.
The iPhone Dev Team also announced that official updated versions of PwnageTool and QuickPwn working with iTunes 8.2 for jailbreaking iPhone 3.0 firmware are under development and will get released soon.