Nrchy and others.
I have a national zip code GIS data layer. So we can add several other separate perspectives (places zip code located)to the Wisconsin map including favorite CD/LP/SACD/DVD stores, hi-end audio shops, repair centers, music venues etc. For hi-end audio stores we can create a data base with such things as top two preamp/amp, speaker, digital, and cable lines; phone number with address (for using in web based mapping sites).
I just need some time to put this together. Before I begin e-mail me your ideas regarding types of places you would like mapped. By the way, for those traveling some distance to visit a hi-end store, for example, it would be great to have some suggestions (identified by place name, zip code, address, phone number) near by for food and/or beverage.