Flimp,
Good question.
As we discussed, marks are important to the MBBB firms. I have spoken to a few truly great people who have failed to get interviews purely due to their marks. The top firms can afford to be very picky because they receive literally thousands of applications a year.
Nothing is impossible, but there is no silver bullet cure for low marks. Some ideas may be to: 1. Do more study (honours, masters, CFA) and get outstanding marks; or 2. Demonstrate outstanding achievement in some other way, which you can use to distract attention away from your marks.
Would it be okay if I asked, what is your ultimate objective? Do you want to work for an MBBB firm so that you can: 1. Do an MBA: If so, there are lots of ways to get into an MBA program without having worked with an MBBB firm. 2. Work as a strategy consultant: If so, there are lots of strategy firms in Australia that you may want to consider. See a list here: http://bit.ly/el5Y0o 3. Become an entrepreneur: If so, it sounds like you are already running your own business which is awesome.
Does anyone else have thoughts on this?