6 Internet providers disclose Web tracking for ads

(AP) -- The nation's largest Internet service providers all say they haven't partnered with Silicon Valley startup NebuAd Inc. to monitor Web surfing and deliver targeted advertising to their subscribers. Here is a look at six smaller service providers, however, that have conducted trials. The companies say all the tests have ended, often to review privacy and related issues. No provider is known to be currently using NebuAd.