Google announced on Thursday in their earnings call that: "In addition to the $5 billion run rate for display, Google reported that its DoubleClick ad exchange had 130% growth in spending year-over-year. One driver of display growth was marketer interest in buying for specific audience categories -- such as hybrid-car buyers or adventure travelers -- which the technology now can target, according to SVP-Advertising Susan Wojcicki." So AdX is growing.
I have been playing with interactive graphing built into Google search. I enjoy typing in functions like sin(1/x)+x^2 = in the box and playing with the graph, zooming, reading off values, etc. (sometimes you see a little message at the bottom, if the function is not plotted correctly and an explanation why).