Sn0wbreeze 2.0 to create custom firmware for iOS 4.1 was released quite some time back, however at the time it only supports iPhone 3G/iPod Touch 2G & iPhone 3GS with old bootrom only. With newly found bootrom exploit by Geohot every existing idevice can be jailbreaked until Apple changes hardware to fix it.
iH8sn0w is working on implementing this new bootrom exploit in its Sn0wbreeze 2.1 which is similar to Pwnagetool for Mac. Hence the next version of Sn0wbreeze will allow you to jailbreak all idevices on iOS 4.1. Now the first screenshots of Sn0wbreeze 2.1 are here,
Sn0wbreeze 2.1 will support,
iPhone 4, 3GS (old & new bootrom) & 3G
iPod Touch 2G (MC as well as MB Model), 3G & 4G
iPad & AppleTV
Stay tunes with us for more information on Sn0wbreeze 2.1 iOS 4.1 jailbreak tool.