Check out this website (and series of books for that matter) - for all things related to off-line marketing.
There are some sneeky ideas here and real life stories. I haven't tried any for myself but they sound quite interesting.
The URL is:
As in Gorilla Marketing
>Does anyone have any usefull contacts, advice
>or warnings about promoting websites from
>non-web sources, e.g. papers, radio, magazeens
>etc. etc. etc...
>All help greatfuly recieved