We know that plenty of you are getting all psyched about the new 3G iPhone, which is set to deliver tomorrow morning. (Hopefully, this release won’t result in as much cutting in line as the first incarnation of the much-sought after gadget.) Via We Love DC, it appears that some intrepid developers have created a new iPhone navigation application called iTrans DC (link requires iTunes), which allows you to access published Metro times. Sounds cool,…