Apparently, the 2,000,000th article in en-wp is [[El Hormiguero]], on a Spanish comedy and science TV show. (This is not yet officially confirmed by WMF, and seems to be under a bit of bickering.)
We should get them to do a skit about Wikipedia for one of their shows, and then release it under a free license permitting reuse and derivative works... then we can set up a kiosk with a television monitor playing that show in a continuous loop (with English subtitles) along with other Wikipedia/Wikimedia stuff (like a speech by Jimbo), and put it in the [[Jordanhill railway station]], thus combining the 1,000,000th and 2,000,000th topics in a place that Wikipedians can make pilgrimages to.