Wake up sleepyhead, it's now March—and that means it's time for the rival Android app store, as boasted about by a mobile ad network, Millennial Media, on Twitter just now. Their tweet read: "Launching this month! Amazon Appstore for #Android-learn more here," and then included a link to a blogpost for developers. Supposedly customers who buy Android devices on Amazon will be able to download all their apps onto their device before receiving it—but we're not sure on just when that'll begin, considering neither Amazon nor Google have formally introduced the app store yet. [@MillennialMedia via BusinessInsider]