good wysiwyg php text box script?
 

I'm looking for a php script to add a wysiwyg edittor for posting comments on a web site. I want to store the text as html in a mysql database once it is entered. Basically, the text box should be very similiar to what is used by this board for entering posts. The only other main feature I would like is to be able to set the default font size rather large.
Anyone have any recommendations?

Per recommendation of a developer of a project I'm working on, I'm using the following:
http://developer.yahoo.com/yui/editor/

"TinyMCE" is also another one I've worked with.

Aside from the above, I've been using open-source libs for database abstraction to "hopefully" keep ugly shit from torquing the database.

The TinyMCE looks very nice. Thanks for the suggestion