This app was mentioned in 1 comment, with an average of 3.00 upvotes
I have a baconreader widget that shortcuts to /r/aleague. That works fine for me xD.
Otherwise, I just use the Official A-League app.. Its live coverage isn't the best, and it takes a while to load, but if you just want to check the score it does a decent job.
If it's a home screen widget you want, I don't know what would be best. Maybe someone else knows some magical piece of A-League related software that will bless our lives.