Angie’s List is a popular and growing service that lets consumers rate contractors and service providers. It’s currently in 20+ cities and growing.

Angie’s List, with its homeowner-friendly format, comes with the added bonus of insider information: the rating system that gives the subscriber the lowdown on the experiences of previous consumers. (from the San Deigo Union Tribune)

They’ve worked to eliminate consumer vendetta’s against a company: consumers can only post once every six months about a company, and Angie’s List reps will sometimes help to mediate disputes between consumers & service providers through their third-party program, Neighbors In Action.

The reports that consumers post (here’s a sample) contain lots of details: