I don't understand what I'm looking at.... Does this webapp somehow detect withdrawals on the blockchain from known Gox addresses that are over two hours old? I mean, it can only do so if Gox actually published to the blockchain, right? Which is not the real concern, right? Aren't we concerned that they are blocking withdrawals outright?
MtGox detects its withdrawals and publish all unprocessed transactions (which are unprocessed after 2 hours) in their API. And this website shows that transactions.
https://en.bitcoin.it/wiki/MtGox/API/HTTP/v0#0.2Fbitcoin_tx