Lets cut to the chase. I picked $0.90 to $0.99. I know for a fact that a MtGox dollar is worth <$1.00. Our business model wouldn't work otherwise. I would say on average 1 Disney/MtGox dollar is worth ~$0.96 to $0.98 on the dollar (hard fiat cash). The number of people will to sell us Bitcoins or Disney bucks would indicate that we aren't the only ones.
I would take this position as well so long as I remain in the mood for acquiring BTC. I'd take the MtGoxUSD and immediately buy BTC with it, as I gather you would as well given your outstanding generous offer to buy BTC from others.
If suddenly there were new "delays" withdrawing BTC, I gather that the practical market value of a MtGox dollar would experience a very sharp correction.
If MtGox were able to prove ownership of BTC commensurate with the asks on the orderbook, then they give confidence to their MtGox dollar, that it will be able to buy the BTC listed for sale. If they could prove they have MORE btc, enough to cover the bids, then they would be able to satisfy much of the concern I bring to the table.
MtGox might be able to do this if it matters to their business... then again they might be too busy. Only they know.
They still need an audit to be taken seriously. Independent as Mark may be, I doubt he knows better than to, for example, challenge the laws of physics and jump off a building naked to defy gravity. I am sure the value of an audit is not lost on him... that is, unless it would report bad news.