The sample issue - which convinced me to subscribe - should be more visible, perhaps even as a quote on the main page. It's just that I came to the site and didn't know what to do or what it's about until I found this sample - I wonder how many people never find it and leave without subscribing.
Nuuton is being developed using a lot of Python. The new crawling system and atoms (APIs) are all Python. Are you interested in knowing more about it? We can share some insight into the inner workings on the search sub-system if you'd like. Send me an email if you are interested (in profile). :)