How are PostgreSQL transactions more real than MySQL using the BerkeleyDB or InnoDB? I have to admit I'm not familiar with the differences, but I was under the impression that they were the same.
Also, I think some people might not agree that PostgreSQL is faster than MySQL. And how is it cheaper? They're both free!
I do agree that Postgres has more features though (missing subselects is almost unforgivable), but MySQL is catching up - apparently version 4.1 (which is scheduled to be out in a couple of months) will have subselects along with a load more features (secure connections! at last!).