Interfacing with rbt001 bluethoot module

Hi, i have a robotech module called rbt001 and i want to interface it with my arduino duemilanove, the module is rated for 3.3v , so i think i'll need a level converter.
Can anyone help me to build such interface? i don't know where to start from...

I have the module datasheet:

And the module user manual:

maybe usefull....

Why anybody cares?