So now I can tick this one off! Yes, I have seen the leaning tower of Pisa and can verify that it is indeed on a lean! Acutally it is quite pretty, a bright pure white that contrasted beautifully with the surrounding emerald of the grass! It was being cleaned while I was there so had a band of scaffolding around it (scaffolding is something you accept as normal when you travel Europe!).
What was far more amusing was the sight of dozens and dozens of tourists posing strangly for photographs, every single one of them pretending to be propping the tower up. Even more amusing was the lone security man shooing hundreds of people off that emerald green grass; no one ever thinks those bright red ‘keep off the grass’ signs apply to them. While it wasn’t the highlight of my trip, the leaning tower is beautiful and worth visiting.