Thanks for the reply.
Now that I think about it, you bring up a good point - which is that what we would *really* like to do is be able to integrate our forum login with our main site login, that is run by Miva Merchant (ecommerce software that also uses MyQSL). And I know that I would be able to have facebook login to miva.
At the very least I would like to have it such that if a customer logs in to our store they are automatically logged into the forum, but ideally there would in fact be only a single login, with an option to create a forum profile.
It sounds very complicated to me, but perhaps I could find someone to do the work (paid) on the dev forum.
Andrew