Ok so maybe Pieter is not as famous as some of the US speakers but I hear that in South Africa he is "The Man" when it comes to XNA.

So if you live in South Africa you can see him speaking at NMMU on 29th of April and Rhodes University on the 30th April. The talk will be 'Developing a game in an hour or less'. If you can attend both Pieter promises to do a different game at each one

Sorry there are no details on time - you will have to contact Pieter through his blog