This is a very cool plugin. I was thinking about developing the same
plugin. It would be nice to have the following features:
1) Calculate the conversion ratio (either how many users signup or buy
product).
2) Show the entry and exit pages.
3) Navigation path of the users.
4) How much time users spend on reading the sales letter.
5) Traffic tracking to find the busiest day and time for the site.
I would be willing to work on these features and incorporate this into
the existing plugin. I know Google analytics provide some stats but it
is not a good idea to give such private information to Google.
Obviously they use that data to maximize their profits by charging
websites more for the Ads.