Mar. 26th, 2011
Amazon requires that your phone be set to allow apps from untrusted sources, which can open your phone to exploits. Google's app store does more inspecting, but is still not invulnerable. Amazon won't consciously allow compromised apps through, but you never know. And Amazon doesn't have a remote kill switch to remove installed apps that are found to be compromised like Google does.
http://www.wired.com/gadgetlab/2011/03/amazon-app-store-security/
http://www.wired.com/gadgetlab/2011/03/amazon-app-store-security/