An interesting visualization shows, how much money is made in the internet industry ... per second! See Battle of the Internet Giants for a live view.
I don't know if this represents real numbers (well, this is a "Real-Time Accumulation of Wealth"), but the live visualization is made pretty well and is impressive!
Especially the fact that Apple profits about 50% of all shown income - with companies as Google, Amazon, Microsoft, facebook, YouTube etc. - I did not know. My snapshot was made after 60 seconds. So in one minute Apple makes a profit of about $ 70K, Microsoft 41K, Google 24K, Skype about 4K, and facebook "only" about 3K while Twitter is loosing money each second.
Thanks, Adis Jugo for sharing in facebook (who made $ 14.940 revenue in the last minute...)!