MySQL from Ubuntu vs MySQL Binary Distribution

Use your distro's package. Then you get all sort of batteries-included extras like updates when there are security fixes, guarantee that it should maybe work on your system, etc.

@that site:

We recommend Ubuntu users to get MySQL, via the apt-get tool. Simply running sudo apt-get install mysql-server will get you MySQL 5.0.

I think you can ignore my first paragraph and just go with what MySQL says.