Here in Houston we get alot of independent reviews. There have been suggestions in the past about breaking off BackPage providers into another forum. But of course there are some that advertise in ECCIE and BP.
My suggestion is to put visiting providers (for Houston at least) into their own forum section. Since they don't come around as often, it makes more sense to be able to seach in local and visiting separately. Plus why do I want to read a review of someone who I can't see (because they have already gone).
I also kinda wish there was a way of telling the local vs the visiters when reading the provider ad section (other than obviously opening the post).