It has been mentioned, that IOS security researcher
pod2g has now overcome the A5 processor cache issue on IOS devices.
This means that the untethered jailbreak will soon be available for both iPad2 and the iPhone4S. Perhaps by another week or so.
So, everyone, get ready your iPad2 or iPhone4S, and your $$, because you'll definitely wanna grab those devices on the shelves with IOS5.0.1 running, so that it can be jailbroken. You can also buy it now and upgrade to IOS5.0.1, as long as Apple didn't release newer version yet.
Else, i believe Apple will have it all sorted out in next release of IOS, which is believed to be IOS5.1 right after the untethered jailbreak is released, whereby it will cover all the exploits manipulated by the jailbreak.
I'm guessing the Installous will be jammed pack again once the new jailbreak is released.