Struggling to find an opt-in interface that was easy and beautiful, I came across Magic Action Box through the Wysija Newsletter plug-in. The marriage of these products is phenomenal and I am finally enjoying doing newsletters and marketing (even though I've just started using both products).
Using Magic Action Box is a dream! It does exactly what it says on the tin... it is MAGIC!! It gives a customized interface that you can design to meet your needs in an interface that is easy to use and understand.
I'm looking forward to upgrading from the free to a premium version. Dean has done a terrific job on this plug-in and it doesn't get better! How will you know??? You won't until you try it for yourself.
One tip: I initially had a problem with the widget. I found that a couple of my other plug-ins were creating the issue and deleted them... now, the widget is marvelous!!! Check for conflicts if you find you are having an issue... it could be another, unnecessary plug-in!