Mailchimp integration?

I use mailchimp to manage all of my mailing lists as WordPress is not the only system we use.

Is there any way for me to use mailchimp to manage my lists for the tribulant newsletter plugin?

I have widgets setup for mailchimp where a user can register for different newsletter groups. I simply need to be able to use tribulant to send an email to all the users on my mailchimp list.

Is this currently possible?