This is a simple package that uses the campaign monitor API to create a simple mailing list sign up form to any of your lists in campaign monitor. All you need to input is your API key and the ListID you want the person to be added to.
It has a few simple options, but all in all is just supposed to be a simple sign up form for your mailing lists. Its a Macro/usercontrol so requires it to be placed within and form tag (Obviously with runat=server).
I haven't styled the HTML, but it as custom classes so you can easily style to match an existing site - Current options on the Macro are: