There are plans afoot to light up the length of Hadrian's Wall on the 13th of March 2010, a spectacular sight that I doubt will ever be repeated.
You can vounteer to be one of the illuminators, lighting the gas powered beacons, and will get a certificate to say you took part.
I'd love to do that but I'll be out there with my camera hoping to get a good shot of the lights crawling across the undulating landscape of the high crags, no doubt rushing backwards and forwards in my usual way.
I've heard from my friends at Willowford Farm that bookings for the weekend of March the 13th are brisk so if you're thinking about coming up (or down) for the event please be quick.
It will also be wise to do a recce of the site beforehand.
The Military Road is very narrow, by modern day standards, with marshy verges so you really can't just pull over to watch the event.
Car parks along the Wall will be busy and you will need to allow time for climbing up and down to viewpoints.