This opt in page converts like crazy. I first stumbled upon it when doing some testing for Natalia (my wife) and our conversions were through the roof ...for COLD traffic.
It'll take you just over 6 minutes to get this done ...so the ROI on your time is HUGE :-)
Also - this videwo shows you how to integrate Megaphone with Infusionsoft and/or Aweber (super easy) so be sure to watch it.