Yahoo! has now integrated local results (complete with maps) for broad keywords (Bing and Google have already done this).  For instance, I typed in “pizza” and these were the results at the top of the page:

According to Search Engine Land, “Yahoo’s results will, in some cases, be better because, when available, it uses the location that users provide via their Yahoo Profile; Google and Bing both rely more on IP-based targeting, which is far from accurate for some users.”  My Yahoo! profile is still registered to my hometown, so there can still be some slip-ups it seems.

Sources: Search Engine Watch, Search Engine Land