With spotify and Google Play music one thing I've always wanted is to find those users who thumbs up the same music you do. The same could be done in Ozbargain for those who vote the same as you do or add up deals that you vote for per user and rank it. So those who you users who post deals you consistently vote up for perhaps you could subscribe to them.
What would be the use of it? As well as deal discovery perhaps if you were selling something and everyone had similar pricing you would sell to the person most similar to you.
What other AI and machine learning features do you think would be useful for the ozbargain website?
I'd imagine it would be quite hard for Ozbargain staff to do this (only a few)