Um bro. At 09-14-2011, 05:19 AM you posted saying that bidding will end in a week, which is 7 days.
It has already been 2 days passed since you have agreed to sell to whoever it was bidding for 100m. So that's 9 days already, one week has passed. If you just posted some random post just to "raise" the minimum bid for your name, then it is definitely an act that would be frowned upon.
And if you are just waiting for the buyer to contact you after 7 days. Then you should make sure he knows that he wins the bid since 1 week has already passed, and try to use every way possible to get in touch with him.
I'd suggest that if you can't reach him soon, either by tomorrow or in a few days time, you should lower your bid to whoever bidded the second highest and look for him/her, if you still can't find them, it's probably some fake bidder trying to raise the minimum price of such a ridiculous name. I'm not really trying to insult your name you are selling, but "Aussie" is a slang, not a real dictionary word, so anyone paying 100m for such a slang-word must have been fake, because sometimes, dictionary words barely go pass the 100m limit. They would probably sell in the range of 50m-70m. So I highly doubt in my opinion that the bidder who bidded 100m on a slang is actually real.
Either way, I hope you get a fix on this, and try to keep the prices as updated as possible. If you can't find the bidder, you have to lower the minimum price.