Eh.. not that impressed with the trailer. Just seemed a whole load of nothing to me. Although perhaps it's the first of a number to be released and they're drip feeding the plot to us. The word association bit looked quite good. Reminded me a little of The Ipcress File.
I hope we don't get too much else. I admit, I just can't help myself viewing trailers - so I don't want to see as much about Skyfall's plot as I seemingly have about Prometheus, for example.
Although this was just a teaser trailer. I expect we will be seeing a "full" one before long.