As of this morning, I am getting the same UI and results on smartpages.com and yellowpages.com (it is the system that was previously powering only smartpages.com). Realpages.com is still using their old system, probably just a matter of time until the change happens their too.
"Today we celebrate the launch of a new YELLOWPAGES.COM site that further leverages, in the online space, the rich directory heritage of the new AT&T and BellSouth -- under a brand that our research shows is the most recognized URL in local search"
YellowPages.com has to seriously be the worst IYP implementation on the market. I can't find anything I am looking for. Even when I do manage to get past all the non relevant ads, the company I am looking for is not in the right category.
On top of that, I can find no way for a business to correct their info without paying. That tells me they are only worried about the ads they serve. The rest of the listings are nothing more then back fill. That may work in the short term. But unless they strive for a more robust and accurate database, the end user will find other places to do their searching.