Chad and I fielded a fairly complex Email Web-To-List and Web-To-Lead question in the Semify Forum. We recorded our answer as a Google Plus Hang Out and thought we'd post the results... The basic idea here is that the end-user wanted to capture a few simple fields first and then push the website visitor to a more complicated form that would capture more information. Enjoy. You can also see the entire Forum discussion here,
Here is the Hang Out: