The post was just publicly setting myself the challenge. After a few hundred calls I'll post up some information on how it's going and hopefully a strategy of sorts will have developed. Don't expect much more than 'I called many people, was attentive, and some bought' in the best case scenario.
Thanks for the Ogilvy quote. I think that's just as valid as it was in the 20th century (I presume that's when he said it). Perhaps moreso.