On Sunday the Post ran a big story on the future of SmarTrip cards containing some good news for DCist commenters who have long complained that the problem with SmarTrip is that you can’t use them and take advantage of any of Metro’s special discount passes. WMATA has announced that by the end of 2008, SmarTrip technology will allow customers to realize the benefits of its special passes like the 7-Day Fast Pass, Montgomery County’s…