I've been telling people at work that you pronounce it "Tot-num"
and the reason for all these riots is that the locals are so angry at people calling north London "Totten-hhhham"
( Grrrmachine the indifference engine, Tue 9 Aug 2011, 13:15, archived)

I interviewed Ossie Ardiles about this time last year.
It was all Tottingham this, and Tottingham that. Very funny. Tragic, in a way.
(rnuk http://flickr.com/rnuk, Tue 9 Aug 2011, 13:27, archived)