Membership site and Intense Debate: How to do one login?

I love Intense debate and I want to know how I can integrate my existing membership site with Intense debate.

For example, right a user can log onto my site and have his own personal page. I want that user to be able to use the comment system provided by intense debate without having to login again a second time. Is there away to do a 'one time' login so that when the user logs into my site they also log into intense debate at the same time.

Please provide any suggestions. Thank you.