Yes and no. It IS the "official" Facebook app, and most certainly must have been developed WITH Facebook. Actually, even the iPhone app development page said it was not developed by Facebook up until v. 3 (I think). --And it definitely was. They just gave credit initially to the FB employee who had done the coding. The story behind this app is that Google "lent" FB an Android dev to create this app.
The Palm, Blackberry, and other "official" FB apps also say they were not made by Facebook. Click "mobile" on your computer at the bottom of the screen and check them all out. FB does this for some reason. Also, any previous apps that have been developed have been forced to remove the word "Facebook" from their names. Bloo was originally called something different, and he was forced to change the name. This is why we have "Babbler", "Bloo", "Fbook", etc. You know every one of those devs would have preferred to name their apps "Facebook". I have no doubt this app is developed officially in conjunction with Facebook.
"We will suffer any consequence tomorrow, not to feel uncomfortable today".