As long as the data is anonymized and aggregated properly and links with less then thousands of hits are never shown then there shouldn't be any problem. One o

As long as the data is anonymized and aggregated properly and links with less then thousands of hits are never shown then there shouldn't be any problem. One other interesting thing they could do with the data is if they started Amazon Search (they're caching a lot of the web as is) they could use their tracking of Google results to goose Amazon Search the way Bing did with IE tracking data.