DW,
I think these would be two really useful features.
1. I'd like to see some type of report that shows the opt-out rate for each follow up. This will help you see which follow ups are turning people off, for example...your average opt-out rate might be 1%, but one particular follow up causes 20% to opt-out, that would be crucial to know.
2. I'd like to see a report on which opt-ins are leading to sales. Maybe a snippet of code that we could paste on our order success page, that included the buyers email address. The script could then query LMP to see where that user was in the sequence.
Thanks for a great product!
Brian Armstrong