After being notified by 'sheffbloke' We must stress that if you do decide to go ahead with the Goole adwords programme; be careful and read all of the small print. Especially parts relating to 'daily budgets' as you can use up credit.
I'm sure given time it could prove to be a valuable source of advertising. However, as with everything it's best to cover yourself by reading as much info as possible.
Thanks to Sheffbloke for informing us!
-Rob-