MSN To Launch Click to Call Soon?

MarketingVox reports on a BusinessWeek article that shows signs that Microsoft will launch a click to call service within its search engine. The article suggests that Microsoft will launch the service this week and it allow “users connect to businesses via web-based calls by clicking on MSN search links." I would assume this will be integrated into MSN AdCenter but it is possible they use a third-party PPC engine for the feature.