iOS 5 beta 7 is jailbreakable by RedSn0w 0.9.8b7
MuscleNerd, the iPhone Dev-Team member, has announced via Twitter that developers can use RedSn0w 0.9.8b7 to jailbreak iOS 5 Beta 7.
MuscleNerd: Today's iOS5b7 can be JB with last night's redsn0w b7 http://is.gd/6eek4Y but point it at b6 IPSW...annoying off-by-1 now
You can download RedSn0w 0.9.8b7 here. iOS 5 Beta 7 is available