I'd love to see one to, but I wouldn't hold my breath. Mt. Gox has a long history which makes it probably impossible to come up with any meaningful estimates of what they might be sitting on.
It is interesting to watch whether liquidity comes off of the public order-book when large trades happen. Some of these within the last few days did not seem to. So it was either BTC that had not been on the market, was in a dark pool, or was newly arrived from quasi-whale contacts of theirs. The most interesting thing to know would be whether they are burning through their own (probably) substantial pool which they've accumulated over the years. These things can only be guessed at and inferred absent a whistle-blower, hack, or something like that. Even then the info would have to be taken with a grain of salt.
