Like Wil I know both since the NeXT/NeXTStep days and what his blog post describe is quite accurate for Bertrand and Craig.
He is slightly incorrect on the reasons/timing of Craig leaving Apple since WebObjects Java was just at a really early stage at the time he left and the offer from Ariba was a good one.
Loosing Bertrand in the Mac OS world is quite a news by itself but at the same time getting Craig is quite a news too.