Ok so I've read this: http://mu.wordpress.org/forums/topic.php?id=3275&page&replies=57
But it leave me with questions, perhaps drmike can answer.
In parking domains, is there any method to automate that?
Is their anyway to automate removal of an entry from .htaccess if somone no longer 'subscribes' to domain hosting, as I will be adding this as a paid and-on
Now I at least know I can automate the changes within the DB with some queries, and should be able to intergrate with paypal subscriptions and IPN to manage this, but if possible I don't want the user to have to wait on me to do anything.