The following comes from the mammoth team that are TMZ:
"A middle-aged, blond woman was taken to the hospital early this morning. We have now confirmed the call came from Tiger's address. The spokesperson for Orange County Fire initially said the 911 call came from Tiger's home but for some reason she later backed off that statement and said it might not be the same address. But, it is indeed Tiger's address. We also know a younger blond woman followed the ambulance to the hospital. And, as we reported, Elin's mom (Barbro Holmberg, a prominent Swedish politician), is in the U.S. to be with her daughter. An ambulance reportedly raced to Tiger Woods' block in Windermere, FL overnight - and transported a middle-aged woman to the hospital... but there are conflicting reports (funny that). Orange County Fire officials confirm a rescue call came in at 2:36 AM from a home on Deacon Circle. TMZ has confirmed the woman was indeed transported to the hospital. A person from County Fire tells TMZ the responding address does not sync up with Tiger's home, suggesting it's a neighbour. But WKMG TV in Orlando is reporting someone was transported and a blonde woman in a black Escalade followed an ambulance from Deacon Circle to Health Central hospital - the same hospital that treated Tiger the night of his accident."
So, either it's Elin's mother, overcome with rage at the mistreatment of her daughter (who, according to today's papers, has walked out on Tiger and is now residing in a nearby property), or it could be Elin's mother, overcome with the news that her daughter's turned her back on $80million... oooorrr it's Tiger's housekeeper, overcome with the magnitude of his dirty laundry.
Story developing; as they say.
UPDATE: The blonde removed from Tiger's abode has been confirmed as his mother-in-law. She was "rushed to the hospital from Tiger Woods' home early this morning after complaining of stomach pains. She is still in the hospital and listed in stable condition."