Get subscription level on registration form and transfer it to Mailchimp

I would like to get a subscription level transferred to mailchimp as merge tag after user registration.
Can somebody help me?

I think Krum’s plugin does that:

thanks, I found also article showing that we can do it by s2-hacks.php but when I save s2-hacks file on server then my wordpress is down.
Do you know why is that happens?

Maybe @krumch can answer better than me.

Thanks @Cassel for recommending @krumch’s plugin. It works!