Not the original poster, but any kind of overtime is rare for salaried work? At least in the US.
I'd take 60% per hour for overtime in a heartbeat as long as it was optional, since I've always ended up doing that kind of work for client/manager goodwill (or the pleasure of not being fired).
For California it depends on both type of work and compensation. You can still be required to pay overtime to a salaried employee if they don't meet certain criterion such as being in a managerial position.
In California, the level for computer professionals is nearly double the main (professional/management/admin) amount ($88K+ vs $45-50K depending on employer size.)
