Oh, that clever Google. Today, the company announced the addition of real-time traffic features to its Google Maps application for mobile phones. With it, you can see congested areas and estimated delays in more than 30 major U.S. cities. This is in addition to detailed driving directions, integrated search results, interactive maps, and satellite imagery. The only catch is that your mobile has to be Java-enabled (you can check for compatible phones here), and you'll need some sort of data plan. We're busy working on a review of Google Maps, so check back soon for our verdict; in the meantime, you can find out more details on CNET News.com.