I test drove the back earlier today for the first time in two months.
I ran a mile sometime around noon, and waited to see if it'd implode. It didn't, so I ran 4 more miles at 7 pm, then went home to ice my neck/back (as preventative measures).
This is the first time since November 30, 2011/since herniating a disc in my neck that I've been able to run.
Not exceptionally fast, not exceptionally challenging (a 4 incline at 1 resistance for the whole distance), but it's something.
My legs and lungs remember how to run; let's hope my neck and back remember how to recover.