Hyatt is returning to the LAX area with a Hyatt Place that will have transportation to/from LAX. Whilst the Hyatt House at El Segundo is right next to the Green Line, you have to get a bus to the Green Line from LAX. My experience is that these buses are not very frequent.
Details are here.
Opening date is 1 May 2013 – I’ve made a booking!
Google Maps suggests that the property is VERY close to the Green Line.