Remember Firesheep ? Well, the cookie snatching Firefox extension now has a more portable cousin called FaceNiff. This Android app listens in on WiFi networks (even ones encrypted with WEP, WPA, or WPA2) and lets you hop on to the accounts of anyone sharing the wireless connection with you. Right now it works with Facebook, Twitter, YouTube, and Nasza-Klasa (a Polish Facebook clone), but developer Bartosz Ponurkiewicz promises more are coming. You'll need to be rooted to run FaceNiff -- luckily, we had such a device laying around and gave the tap-to-hack app a try. Within 30 seconds it identified the Facebook account we had open on our laptop and had us posting updates from the phone. At least with Firesheep you had to sit down and open up a laptop, now you can hijack Twitter profiles as you stroll by Starbucks and it'll just look like you're sending a text message (but you wouldn't do that... would you?). One more image and a video are after the break.