I'm trying to add my Facebook account instead of using Facebook for HTC Sense. However, when I go to Accounts & sync > Add account > Facebook, nothing happens. If I tap any other account, I get prompted for login information (or, if I'm already logged in, the ability to change settings or add a second account). I really dislike the Facebook for HTC Sense, so there's got to be a way to add my Facebook account without using Facebook for HTC Sense.
You could download the actual Facebook for Android app from the Marketplace. This would mean that you use the actual Facebook app rather than Facebook for HTC Sense. Not sure if there is any difference between the two, but I know I have both installed on my Desire and use the actual Facebook for Android app.