During the last 3 days about 20k BTC have disappeared from the order book (at least as I write this).
Do you think it's just one major player (possibly a company) buying? Is the withdrawal of funds from Fort Gox via BTC over?
I think it's one major player (probably a company) instigating and maintaining the uptrend to acquire an inventory of bitcoins as cheaply as possible while keeping the price as stable as possible to protect their assets.