I have gathered a list of countries and cities (around 80000 entries). All countries in the world, and picked cities based on population. It took few days to do this, i tought it would be much easier. I am aware that that there are many services that offer this or free ones (some with milion of entries, some with states, villages, etc.), but they are not sorted in a way that i needed so i guess someone might need this too. So its very simple list = Country/City for a user registration or anything else someone might find useful.
why not create item in numerous formats, like this does.http://dev.umpirsky.com/list-of-all-countries-in-all-languages-and-all-data-formats/
i am sure with cities yours is more useful, but multiple data types and a front end could be a great seller.