The world has been waiting for an official Facebook tablet app, and waiting , and waiting . But that app may not appear on the iPad first (although Facebook is working on an iPad app for sure ). Instead, Facebook's first tablet app will appear on the HP TouchPad, which comes out this Friday and runs the WebOS it bought with Palm . Unless the iPad app also launches this week, the TouchPad will become the first tablet with an official Facebook app. Given the tension between Apple and Facebook, a concurrent launch on the iPad seems unlikely. How do I know? I got my hands on some screenshots of the Facebook app for the TouchPad. You can see them here. But what I wonder is if this is also what the app will look like on the iPad. All I can say for sure is that these pics are from Facebook's tablet app running on WebOS.