As I already wrote you can well go to Linux distribution vendors if you’re looking for recent MySQL version in a hassle free binary form. (On the time of this writing you could only get binaries for MySQL Community 5.0.45 from MySQL Download Pages which was released in July and so about half a year old.
If you prefer to run binaries based on Enterprise codebase – the most up to date version 5.0.54 is now available for CentOS starting with CentOS4:
mysql.x86_64 5.0.54-1.el4.centos centosplus
mysql-bench.x86_64 5.0.54-1.el4.centos centosplus
mysql-devel.x86_64 5.0.54-1.el4.centos centosplus
mysql-libs.x86_64 5.0.54-1.el4.centos centosplus
mysql-server.x86_64 5.0.54-1.el4.centos centosplus
These are not built exactly same as ones you would download on MySQL Web site, ie BDB may be enabled by default but in general I have not seen major issues with RedHat builds for quite a while now.