First off, I'm new to xda Developers so please excuse me if this is in the wrong forum! I thought I'd post information about a tool I wrote here which roots stock 4.0.3 leak on the A500, A501 and assumingly the A200 too. Its literally one click - just enable USB debugging. "ICS Root" also installs, optionally, FaceLock and Trebuchet (although FaceLock doesn't want to work. It lets you set it up though =P)
Since version 5.0.1 this also now works with the new 0.022.00 leak!
The full post is over at TegraOwners: http://forum.tegraowners.com/viewtopic.php?f=30&t=350
The only real system requirements are Windows (with .Net Framework 4) and an Iconia on the stock 4.0.3 leak. I hope somebody finds this useful its been tested by myself and a couple of TegraOwners users and it works well.
In terms of the technique used, it uses the great Jay Freeman's mempodroid exploit to gain root at which point it mounts /system rw and installs su, busybox and Superuser.apk so no real surprises there. Installing Trebuchet adds that apk to /system/app and installing FaceLock installs the apk to /system/app before installing the pittpatt folder to the flexrom (mounted as /system/vendor). I plan to open source it when all the requested features have been implemented and the code has been cleaned up.
EDIT 14/05/2012: ICS Root 7 is out enjoy!
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