Large Super stores like HN are more likely to grow Wi Fi than any smaller shops simply by the mass amount of foot traffic into them.
HN also sells Belkin and Dlink and have implemented a wireless lan in the Wairou Rd store so have some experience in using it.
You would do well to work with the large stores to promote Wi-Fi, I am sure they would be happy to sell more of what they already stock.
Well thats my thoughts on it Super stores are mass markets, those that learn more would then goto the specialist stores to do better things
-erata I do not work or speak for HN