At trAce in 2000 we conducted a survey, both online and offline, of writers using the internet. We logged 1348 survey responses of which 523 came from the online survey and 825 from the postal survey. Of the online responses, 36% came from the United Kingdom, 33% from the United States of America, 10% from Australia and 7% from Canada. The remainder were split between the rest of Europe and the rest of the World. Responses from the postal survey were almost exclusively from the United Kingdom.
I am the first to confess that our methodology was pretty scrappy and we were so busy that we never got around to publishing a full set of results but perhaps the most interesting responses were the ones received to the question 'What worries you about the internet?'.
I'm curious to know what the answers might be today to this same question. Or can anyone point me towards a more recent study?