Googlers Visualized
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blogoscoped.com
Also, the data is out-of-date. The last quarterly report (came out last week) said there were slightly under 20,000 employees.
What about making the images small so you can see them on one page. Perhaps you could compare them to the sizes of other companies. You probably don't have this data, but showing geographic or job-role distribution would also be interesting. Or, you could show a visualization of profit per employee.
I work at a company that's an order of magnitude bigger, and I interact with about 5 people on a daily basis and maybe know the names of about 20 people there. (We have a big building, so the team I'm on mostly has the floor to itself.)
I am sure there is groupthink among the 5 of us, but I'm not sure that there's an opportunity for us to think like the other 280,000 people. If we do, it's a coincidence.