oh, and an update to the post below, eric schmidt asked barack an "interview" question to lighten things up before they got into more serious questions...

"How can you efficiently store a million 32-bit integers?"

"Well, er, the bubble sort probably isn't the best way."

you could totally tell who the software engineers were in the audience, because they all laughed and i just sort of rolled my eyes. barack totally geeked it up, and everyone ate it up. :)