IBM Derides OpenSolaris as Not-So-Open
The way I see it, the reason IBM is acting like this is because they refuse to open source their own major programs (like DB2 and AIX).
So they can't say "Sun is doing a good job at open-sourcing their own software" because then they'd be asked "so why aren't you doing the same?" - and because nobody likes to admit a competitor is doing a good job.
So we get these mealy-mouthed attacks instead.
Given that DTrace has been integrated into MacOS X into Leopard:
and that it's also being worked on for FreeBSD, isn't that proof enough?