Is there a way to incorporate Wordpress wysija newsletter plugin with ci?

[eluser]Cgull[/eluser]
Hello,

I have a customer that wants to use Wordpress wysija newsletter plugin with a codeigniter site I developed for him.

I saw a lot of information on the net for using Wordpress with codeigniter but can't get the actuall process. How would I use the newsletter plugin with my ci site?

When a user subscribe on my ci site how will I tell the wp plugin about this user?

A bit in the dark here, can someone maybe help?

Thank you very much.