We haven't announced a specific date, other than late April. We'll definitely make another blog post and other announcements when it's available.
As for discounts, we always have a 30% automatic discount that is applied for users that keep their subscription active. For subscriptions that have already expired, you'd need to purchase a new subscription if you want access to the new release. The 30% discount is offered because user's that keep their subscription up to date require less support, and we like to pass that savings along.
We never offer coupons, sales or other promotions and will not be doing so when JFBConnect v7 is released either.
I hope that helps answer your question, but if there's anything else you need, please let us know.
Alex