The Pop Up Machine covers all of the bases, including being more search engine friendly...

  Search Engine Friendly (Places Popup Code At Bottom Of Page Or ???)

  Use Keyword Rich Content (Search Engine Spiders Eat It Up)

  User Friendly (Easy To Follow Instructions - Copy/Paste/Create Your Own)

  Many Different Newsletter Subscribe Popups (Just Copy/Paste The Code)

  Different Styles (Slide In, Bounce In, Drop, and More)

  Time Delay (Set For 0, 1, 5 seconds, or ???)

  Cookie Based Popups (Stops Repeat Popups)