"Vatican confirms Pope's November trip to Turkey" - CWNews

Confirmed (again, this time along more official protocols):

The Vatican has officially confirmed plans for the trip by Pope Benedict XVI to Turkey. As previously understood he will visit Ankara, Ephesus, and Istanbul, on a trip from November 28 to December 1.

The official Vatican announcement makes a point of noting that the Pope's trip is a "response to an invitation from Ahmet Necdet Sezer, president of Turkey." Actually the Pope received a much earlier invitation from Patriarch Bartholomew I of Constantinople, and the Turkish government delayed the voyage by failing to issue its own official invitation last year. But the Holy See is clearly intent on preserving proper diplomatic protocol, recognizing the sensitivity of relations between Rome and Ankara.

... before leaving the country, he [Pope Benedict] will stop at the site of the Hagia Sophia, the ancient Christian basilica that has been transformed first into a mosque and now a museum. [source]

I'm still wondering what the Pope does at the Hagia Sophia.