WOAH. I had no idea! That's awesome!
Were you really surprised when Vaughn rolled up? I mean, you already had a camera crew in your front yard. Did they tell you they were there for something else?
Seriously, though, congratulations. That's so awesome.
I think around here you can get pulled over for "dangerous acceleration" or something like that. I think it's pretty stupid, because it's completely arbitrary. Just look around for the Five-Oh before spinning your tires.
My rule: if you can't do it with both drivers still smiling and laughing, it's not worth it. Not that this is my only rule - I just do "acceleration races" like you did, but if it gets serious for either party, he or she should take it to the track.
^I think tuning companies are probably restricted by the manufacturers, here. With most OBDII tuners, you have to shut off the car and restart it. If the ECU needs a reset to switch the maps, there's only so much tuners can do while it's running.