Whats the best plugin for a floating optin?

I want a floating optin on my wilsave.com page. It may be the slide in plugin, or maybe something else. I see something on http://www.advisorinternetmarketing.com
It says it was made by a company called popup domination. Does wpmudev has a plugin that will do something like this?
My goal is to have the popup float in and then when they sign up subscribe them for future emails and newsletters all in one swoop.