I'm becoming a big fan of Insider Pages. I've used to find a mechanic and dentist this week. It's still a new service, so there aren't a ton of reviews yet, but they're off to a good start. I don't think they have too much of the smarts built in yet, e.g. the opinions of people with those similar to mine should be weighted higher, at least for things like restaurants and bars, but there doesn't seem to be any spam yet, at least.
They also provide a wordpress plugin which allows cross-posting on your blog
and Insider Pages.
The state is that great fiction by which everyone tries to live at the expense of everyone else. - Frederic Bastiat