plugin like foobar? But we need something that will do this...

Something easy to use like foobar with it's good looks

But we need it so we can make newsletter signup bars like this site (at the bottom)

that can also do signups like this (slides in from top)

To do the floating bar that follows the page, but we need it to be customizable to suit a site.

Anything like this or could a plugin be made to do it? If so you would save me tons of time per site i make for clients!