Bottom line is you can't take a huge vessel(read ship) and expect to start making waves in a pond, leave alone staying afloat. The smaller dtaabases vendors are making solid ground(mysql) being the one hogging the most spotlight. And I'm certain that sqlserver might suffer as it's ground on small businesses will be/may be taken over by the likes of mysql.

The MySQL version 5 and 6 are going to be feature rich databases. pl/sql kind of features, more stuff is coming. It's interesting but I guess I'm much too oracle tuned...