You haven´t missed it, right? To be sure everyone has seen it:

 

Here you can see what dates and places Brandon Sanderson will visit during his AMoL signing tour.

 

If you are lucky enough to live near one of those places you just have to apply for becoming a Memory Keeper.

 

 

Good luck!

That's quite a long tour! Sounds exhausting! 

I wish he could have made it even longer and added European cities as well.