Auto Generate Database Diagram MySQL

I'm tired of opening Dia and creating a database diagram at the beginning of every project. Is there a tool out there that will let me select specific tables and then create a database diagram for me based on a MySQL database? Preferably it would allow me to edit the diagram afterward since none of the foreign keys are set...

Here is what I am picturing diagram-wise (please excuse the horrible data design, I didn't design it. Let's focus on the diagram concept and not on the actual data it represents for this example ;) ):

diagram see full size diagram

I believe DB Designer does something like that. And I think they even have a free version.

edit Never mind. Michael's link is much better.

Try MySQL Workbench, formally DBDesigner 4:

This has a "Reverse Engineer Database" mode as far as I remember,

The "Reverse Engineer Database" mode in Workbench in only part of the paid version not the free one.