The Chronic Dev Team led by pod2g released a video of their untethered jailbreak on iOS 5, this sadly didn't include the iPhone having Siri activated. It appears that they have created an untethered method for iOS 5 on the iPhone 4, iPad, and other older devices running iOS 5. Check out the 2 minute video for yourself. I would love to have Springtomizer 2 on my iPad with an untethered jailbreak!
This means that iOS 5 will finally be untethered once this can be packaged for the jailbreak community. Both the iPhone Dev Team and the Chronic Dev Team are working hard to bring the community a convenient, quick, and simple jailbreak exploit method. Be sure to sign up for Crash Reporter to help the jailbreak developers iron out all the issues with these hacks.