I think WordCamp Central should do the following badges:

I am speaking at WordCamp...
I am attending at WordCamp..
I am volunteer at WordCamp...
I am sponsoring WordCamp...

However I think the badges should have year on them.

I am speaking at WordCamp Toronto 2014
I am attending at WordCamp Toronto 2014
I am volunteer at WordCamp Toronto 2014
I am sponsoring WordCamp Toronto 2014

However I wouldn't like to see the badges be generic type with just the name of the location be different. each city should be unique.

I think the badges should be different sizes. not just 125 x 125.

125x125, 300x250, 468 x 60, 728 x 90, 120x600, 160x600