jmccormac - 7:13 pm on Oct 9, 2012 (gmt 0)
This is part of the approach that I was looking at. As it would be deeply linked to the search engine, a site getting knocked out of the index may well have the directory entry knocked out too. Though Bing has been improving over the last year or so (or Google has been declining), the last thing I would want to do is adopt its approach to local search. The vortal approach to niche search is also a possibility. It is one of the things that I've tested out on a small (approximately than 2K sites) scale.
The directory model has failed so many times it's a little bit tragic though. DMOZ - spammed to hell (they never reacted to market changing around them and the model didn't scale). Yahoo - died a slow death (again, they never reacted with the market changes). Any link directory - was always spam. Yellow Pages, etc - slow to embrace technology, slow to adapt their model. But I do think a directory model of some sorts could work.