This stuff is interesting, and we should add more companies.
I took this table from wikipedia (http://en.wikipedia.org/wiki/List_of_the_largest_global_tech...), put it in a spreadsheet, and added a column for revenue/employees. Anybody can edit, so feel free to update with more recent figures and add other companies.
What happened to that spreadsheet? It's been completely cut down (and not even to the top-N as there are many other tech companies with better numbers that were removed). Folks added many more companies than are currently showing and we had columns for Profit and Profit per employee (which I think is a much better metric).