Using My Favorite Mailclient When Reporting Bugs

Dear Lazyweb,

is there an option in reportbug allowing me to use Thunderbird (KMail, foo, ...) to write the bugreport? I'm currently using vim, but Thunderbird's spell checker is much more convenient to use and copy-pasting from KDE into vim is not working very well, making it cumbersome to attach backtraces and stuff.