If you haven't noticed yet, packages for MySQL 5.1 have been moved to the public repos. I whipped up updates for PHP 5.2.14 and httpd 2.2.16 as well. For those that have programs compiled against the mysql 5.0.x client libraries, a mysqlclient15 package has been added.
As I mentioned in an earlier post, there are some potential issues you might run into when upgrading from MySQL 4.1 or 5.0. It is absolutely critical that you run 'mysql_upgrade' after installing the update. Failure to do so will cause serious weirdness with your databases.