Sun Microsystem buy MySQL

Sun Microsystems has agreed to buy MySQL AB for $1B, giving them additional leverage in the open source community and providing access to MySQL to its larger corporations. The deal is expected to close during the third or fourth quarter.

The grand question, of course, is: what does this mean in the long term? Sun already offers JavaDB as a smaller-scale DB (compared to 'large offerings' like Oracle9 and IMS). Is Sun merely diversifying its own portfolio, looking for an additional revenue stream from MySQL AB's customers, or shifting away from JavaDB/Derby? Consider the following quote from Sun's press release: