If the hospital haven't already done it, get them to organise a social worker to start with. They should also be able to contact the leukaemia foundation and get one of there workers to come in. Either them, the hospital or Ronald McDonald will help out with accommodation for her/family.
The social worker might be able to help with finding someone to help out around the house (cleaning and stuff), otherwise call someone like Dial-an-Angel (they are national) - not cheap, but they provide everything from home-carers, to a nanny or babysitter, cleaners etc. Or even a church group/volunteer organistaion if she's involved in anything.
But, really the cancer council and leukaemia foundation were the ones that helped us out. It's pretty tough and very scary in those first days when you have no idea what to do/expect and where to go, so having organisations that know what your going through is the best. Good luck to her, hope all goes well. Good luck to her! xx