When I've just exported a file from Query or from Export it would be FANTASTIC to have a "view file now" option in the pop up that tells me how many rows were exported. Similar to after a file has finished downloading, there is an option to view the file when finished.
Convio Has This!
In query you can get around this by exporting to e-mail and then double clicking on the file and closing the e-mail, but you are correct in saying that would be really handy.