The CLB does maybe still have a risk of a lock.
There are three steps to the CLB. First you disconnect the lock motor connector. A dummy load is attached to the side of the connector that goes to the PCM. This fools the PCM into thinking the lock motor is still connected. Then you attach a wiring harness with an attached 9V battery to the connector that goes to the lock motor. The lock motor retracts fully. You disconnect the battery harness, tuck the connector up out of the way, and you're done.
The lock motor is no longer attached to the PCM, and it's been retracted "manually" with the external battery so the steering wheel is permanantly unlocked. The PCM thinks the motor is attached, and does it's "in and out" thing as you turn the key, but it's only driving the dummy load, not the actual lock mechanism.
The problem is that some have suggested the lock motor in it's now-permanent unenergized state can still move (mechanical shock and vibration), and with time may "creep" back to the locked position.
Bad for you if it happens when you're going through a ramp at 75MPH.
Better solution, more work. Provided you have a Dealer that'll help you, buy the kit used for the CLB recall on Automatics. For Automatic transmission C5s they remove the steering wheel and replace the pawl (the thing that engages with the latch when the latch is driven to the locked state by the lock motor) with one that doesn't have the feature to engage the latch. The motor still does it's "in and out" thing when you turn the key, but it doesn't latch with anything so the wheel is guaranteed to always stay unlocked.
If I understand correctly, the 6-speed recall only includes reprogramming the PCM. It adds additional checks designed to prevent false locking or unlocking, but the PCM is still capable of performing either.
One thing I've learned in my years in engineering, nothing in software and electronics is 100% foolproof. Given enough time or enough units in simultaneous operation, failure modes are always exposed.
The Manual's software-only solution is still imperfect and capable of failure compared to the Automatic's robust, mechanical-only solution.