Anyone seen the new Alltec demo van? now that is ott.
And ott is good in my opinion, it creates interest, my new van will be a headturner when i get it done i know that.
As for a message im gonna go with
"DO YOUR CARPETS NEED CLEANING??"
or
"COULD YOUR CARPETS DO WITH A CLEAN??"
This in my mind, attracts attention, and most people will be thinking, oh yeah they do actually.
If your van stands out the same people will see it over and over, and eventually that question will bug the hell out of them and they will give in (thats the theory anyway)
Other things i think that are worth doing with vans are, the buisness card holders you get, or a leaflet box on the side, some people might not be interested enough to stop and take down your number at that time but might just grab a leaflet or card to read latter.
I also like the idea of directing people to a recorded message or website where they can get more info without feeling threatened, a large percentage of the jobs i get from my leaflets say they have looked at my site first.