Half a million
A couple of years ago I decided to write an article on the Cell processor. I had read the patent once and it clearly wasn't understood widely so I though I'd explain it.
Being the first explanation written in English rather than lawyer-esq it attracted some attention, it appeared on Slashdot and of course got zillions of views.
The views slowed down of course but have never stopped, it gets read typically more than 150 times a day from locations all over the globe.
Amazingly, the other day (15th Jan 07) it passed half a million readers.
Listening to: Jean-Michel Jarre : Aero