Oh wow, I just bought 1 year for $5 AFTER GDrive was released and I have now 25GB of storage, but now if I click on the link it brings me here: https://www.google.com/settings/storage/ and says my current plan isn't available any more. Sweet!
no need. If you have an old/unavailable plan you've been grandfathered in and can stay on it, renewing at the same price indefinitely as long as you don't change your plan or a payment fails.