Before OMF in Final Cut, you used to zero out all your audio and export each section (Dialog, Music, SFX) as a separate Mono/Stereo file. You can still do this in FCP X by just grouping together (Compound Clip) a certain type of audio and exporting it out as one long file. Not nearly as easy as an OMF but will get you by until we get that feature.
tony
http://www.HungryCliff.com