Yes, you are not mistaken. Siri personal assistant for Android has appeared in the online store Android Marketplace. We hasten to note that the application was not hosted by Apple, but by a developer named "Official App". Apple introduced Siri alongside the iPhone 4S and since then, the virtual assistant has become the most talked about feature of the new smartphone. The Siri version for Android got everyone's attention.
Released Siri for Android has been downloaded over 1000 times with an average rating of 3.5. As you probably guessed, Siri for Android is fake. Siri for Android isn't its own app, it's just a shortcut to Google's built-in voice control. Siri for Android uses the same shortcut as the iPhone 4S. The placement of this app is a prime example of Google having to set rules and guidelines for the Android Market, as this app infringes Apple copyright.
So far, there has been no official action from Google. I wonder how it will end. But at this time, the same developer published another app called "Pinterest" - a complete rip-off of the App Store app of the same name.