This isn’t a brand-new item but is something I just noticed: Yellowbook.com now offers the ability for users to rate businesses and read the reviews of others.
The reason this is notable is that the IYP for a while was a holdout in not doing this, with the assertion that there wasn’t enough demand among its users to guarantee enough review content to make it worthwhile. This joins a series of recent moves by the IYP including redesigns, SMB video, a recent partnership with YouTube, etc. (listed here). All good moves.