This idea of email tax returns has been done in the U.S. with much success. Maybe we should try to do it here in Canada.
As for getting you refund back quicker.... Don't wait until the deadline, do it as soon as you get your t4's ands stuff. All should be in your hot little hands by feb 28 (that's the law) File immediately and you should get your cheque back in time for easter vacation.
( I got this info from a friend of mine who works at the Revenue Canada Processing office in St. John's Nfld)
And really, to the most dedicated of hackers, is there really a "secure" line??