I don't think there were any forks as a direct result of the Oracle acquisition, but that's probably because there are several other prominent forks already and

I don't think there were any forks as a direct result of the Oracle acquisition, but that's probably because there are several other prominent forks already and many of the MySQL people were displeased with the state of affairs under Sun, let alone Oracle. So most of the exodus had already occurred. Check out MariaDB and Drizzle as starting points. :)