Well, it means you can't simply cross PostgreSQL off your list because it's a dog
anymore. Now, not only does Postgres have dozens of very advanced features that MySQL
lacks, but it doesn't appear to be weighed down by those features as it was in the
past. And that's good for everyone.
Expect to read more about Postgres here in the future - most notably I'm going to
write up a more-detailed article on how to properly use transactions and foreign
key constraints in your database. Both features are going to be used throughout
the SourceForge code base in the near future.