Thanks Aaron!
To explain things a bit - the registration for the LSO class is indeed being handled through ILDA, which is why you have to
go to their "shopping" website to sign up. And yes, this means you have to "register" with ILDA's e-commerce site in order to get into the class. BUT THIS DOES NOT MEAN YOU ARE JOINING ILDA! It's just that you need a username and password to complete transactions on the site.
If you want to join ILDA at the same time, you can of course. But this is not required. (Note that ILDA members will save $50 on the price of the class.)
Also, if anyone wants more details about the "meat" of this LSO class, the details can be found
here.
Adam