Oracle buys Innobase. MySQL between rock and hard place? (by Jeremy Zawodny): "MySQL is now faced with the prospect of licensing technology they cannot ship without from their biggest rival. Interestingly, there's always been once piece of the InnoDB puzzle that's not available under the GPL: the InnoDB Hot Backup Tool. Without it, database administrators cannot backup their InnoDB tables without shutting down MySQL or at least locking out all transactions.
Oracle just bought themselves a whole lot of leverage with MySQL AB and a talented team of database engineers to boot."
The official-speak MySQL AB response to the deal, thus far, ominously reminds me of Apple's 1981 "Welcome, IBM. Seriously" ad in the WSJ (see, e.g., this recap).