We may not have won the HQ race but Amazon's Detroit presence continues to grow. Yesterday they announced the order of 100,000 electric delivery trucks from Plymouth-headquartered Rivian, a startup truck builder backed by Ford and Amazon. [Production, however, will be at a former Mitsubishi plant in Normal, IL]

Beyond the news of the Silverdome site plans, I have learned from a former employee of mine who has recently been hired, Amazon has quietly grown its tech hub in the 150 W. Jefferson Madden Building to over 500 employees. They are engaged in a wide range of activities from cloud computing to relations with the auto [or I guess I should now say 'mobility'] companies on the autonomous vehicle front.