Afew years ago, Eggy and I did a poll about rating all (then 188) Queen songs. People e-mailed Eggy or I, and we e-mailed a spreadsheet, and then 30 people returned the completed spreadsheets back to us via e-mail. After that, I analyzed the data. Overall, conducting the poll was not too hard, but it was somewhat time consuming.
See my signature for a link to the poll results.