@snood,
Actually, I heard a lawyer say today that the tapes might be admissible in court because they contain evidence of the commission of a felony (actually several felonies) and that may likely provide an exception to the California two party consent for taping.
On the tapes, Gibson admits to assaulting her (she claims he hit her so hard he knocked two of her teeth out), possibly hitting her when she was holding their baby (which is child endangerment), and he also threatens to seriously harm and kill her (which is aggravated harassment). So, according to the lawyer I heard, the tapes might not only be admissible, they might be instrumental in putting Gibson behind bars for several years.
In the latest tape, released today, the ranting Gibson threatens to burn the house down if his girlfriend doesn't give him him oral sex.
If you care to listen, that one is here
http://www.radaronline.com/exclusives/2010/07/exclusive-audio-out-control-mel-gibson-says-hell-burn-down-house-after-demanding
Charming fellow.
It is not known who has leaked these tapes. The girlfriend has denied doing it.