usyd/unsw/uts have open days on jan 5th, which is also the last day to change your preferences for the main round. i'd say you should ask them on that day for more information on what you want to know.
but as minai already said, the most common way is to trasnfer after 1 year of study in a degree with a lower cut off. i'd suggest you check out macq uni and uws as well because they have an internal trasnfer policy which will make it easier for you to trasnfer after the first year. with usyd/unsw/uts, you have to go thru uac again as well as get a d average or higher!!