We are also most definitely going to be looking for an alternative to Mandrill. It would really suck if we didn't have the ability to use this app, as-is or a new version with another email provider. I have no issues paying $20 for a MailChimp account. The issue is that we are going to need to pay for almost 300K members in order to send our monthly newsletter once per month. That's an additional $1,300 for sending one newsletter. Not gonna happen!