I have now lost count of the amount of work having my van fully signed has brought in.
Though I would not necessarily say I've had many phone calls as a result of it.
I've been parked in the local Tesco and had people come up and tap on the window, or parked up having a cuppa and have the same thing happen.
It's image isn't it, It's there in peoples faces all the time, it's continual advertising.
It cost me £250 to get my van signed, and it is money very well spent indeed.
But if you do go for it, keep it simple, make sure that people know in an instant what it is you do.
your name isn't totally relevant, what you are and what you do needs to be the thing that stands out the most.
Look at the various vans that pass you, some look really smart with their sign writing, but by the time you've worked out what the hell they do it's too late and they are out of sight!!
I'll take a couple of pics of my own van and slap it on here later, it's nothing special, but it's simple and stands out (the sign writing that is!)
Ian