Pod2g has announced that the code signing bug Charlie Miller found in iOS 5 will make creating a jailbreak much easier and warns users not to update to iOS 5.0.1.
The Chronic Dev Team has announced that they've found 5 userland exploits in iOS 5 making it very likely that an untethered jailbreak will be available for the upcoming firmware.
MuscleNerd has announced a major update to RedSn0w that removes the need to select an IPSW and brings the ability to save and submit your SHSH Blobs to Cydia.
I0n1c has released an App Store app called 'System and Security Info' that can detect if your iPhone has been jailbroken or if there are any other anomalies on your device from a security standpoint.