Someone kindly pointed me to this post on the Language Log blog, about a survey on North American English Dialects that is being conducted by (I think) researchers at Yale University.
We are doing research on different accents in American English. We know that Americans and Canadians have a great deal in common in the way they speak, but there are also differences. In order to study the ways that North American accents differ, we have put together a survey of common words, and we’d like you to participate!
To participate, you need to have grown up speaking English in America or Canada, and some computer equipment as the recordings are being made over the internet. The survey asks for some basic demographic information but participants are anonymous.
Please participate if you can!