Clickity Click - http://www.lucolo.com/

Advice

- You mention what Lucolo does not do - but it is not clear what it does do, o make it a viable email alternative. No mention of any features either.

- If you are not comfortable providing screenshots, a simple mockup would do as well. This works wonderfully on conversion rate (in your case visitor to email capture)

- Have an "about" page on the website, that gives us some information on who you are and why we should trust you with our email addresses.

All the very best!